Articles and Abstracts in Conference Proceedings

2021

180      Sylvester Amoah, Solomon Ojo, Huong Tran, Grey Abernathy, Yiyin Zhou, Wei Du, Joe Margetis, John Tolle, Baohua Li, and Shui-Qing Yu, Electrically Injected GeSn Laser on Si Operating up to 110K, CLEO 2021 (Accepted)

179      Serhii Derenko, Serhiy Kondratenko, Oleksandr Datsenko, Yuriy I. Mazur, Shui-Qing Yu, and Gregory J. Salamo, Lateral photoconductivity of GeSn alloys, Proc. SPIE 11680, Physics and Simulation of Optoelectronic Devices XXIX, 1168008 (5 March 2021); https://doi.org/10.1117/12.2583072

2020

178      Jake Bass, Brandon Brea, Huong Tran, Wei Du, Richard Soref, Shui-Qing Yu, The effect of two-photon absorption on the dynamic range of integrated microwave photonics links, SPIE Photonics West (2020), In Proceeding of Silicon Photonics XV, Vol. 11285, page 112851C.

177      Abbas Sabbar, Syam Madhusoodhanan, Huong Tran, Binzhong Dong, Jiangbo Wang, Alan Mantooth, Shui-Qing Yu, and Zhong Chen, Investigation of High Temperature LED and Photodetector from InGaN/GaN MQWs, CLEO: Science and Innovations, JTh2D. 16 (2020).

176      Yiyin Zhou, Yuanhao Miao, Solomon Ojo, Grey Abernathy, Wei Du, Greg Sun, Richard Soref, Jifeng Liu, Yong-Hang Zhang, Mansour Mortazavi, Baohua Li, and Shui-Qing Yu, Direct bandgap electroluminescence from SiGeSn/GeSn double-heterostructure monolithically grown on Si, CLEO: Science and Innovations, SM3M.4 (2020).

175      Grey Abernathy, Yiyin Zhou, Solomon Ojo, Yuanhao Miao, Wei Du, Greg Sun, Richard Soref, Jifeng Liu, Yong-Hang Zhang, Mansour Mortazavi, Baohua Li, and Shui-Qing Yu, Study of gain for SiGeSn/GeSn/SiGeSn multiple quantum well lasers, CLEO: Science and Innovations, SM3M.5 (2020).

174      Yiyin Zhou, Huong Tran, Wei Du, Jifeng Liu, Greg Sun, Richard Soref, Joe Margetis, John Tolle, Yong-Hang Zhang, Baohua Li, Mansour Mortazavi, Shui-Qing Yu, Mid-Infrared GeSn/SiGeSn Lasers and Photodetectors Monolithically Integrated on Silicon, CLEO: Science and Innovations, JM2E. 1 (2020). 

2019

173      A. Mosleh, S. F. Banihashemian, S. A. Ghetmiri, W. Du, J. Liu, B. Li, M. Mortazavi, and S.-Q. Yu, Carrier Plasma GeSn Modulator for Mid-Infrared Integrated Microwave Photonics, International Topical Meeting on Microwave Photonics in Ottawa, Canada, Oct (2019), Accepted.

172      S. A. Ghetmiri, H. Tran, A. Mosleh, W. Du, J. Liu, B. Li, M. Mortazavi, and S.-Q. Yu, Si-Based GeSn Photodetector for Mid-Infrared Integrated Microwave Photonics, International Topical Meeting on Microwave Photonics in Ottawa, Canada, Oct (2019), Accepted.

171      Yiyin Zhou, Huong Tran, and Shui-Qing Yu, Wei Du, Joe Margetis, John Tolle, Seyed Ghetmiri, Aboozar Mosleh, Mansour Mortazavi, Greg Sun, Richard Soref, and Baohua Li, 2019 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS), Nashville, TN, USA (Accepted).

170      Syam Madhusoodhanan, Abbas Sabbar, Stanley Atcitty, Robert Kaplar, Alan Mantooth, Shui-Qing Yu, Zhong Chen, Optical Characterization of GaN Based Blue LED Devices for High temperature Power Electronic Modules, 13th International Conference on Nitride Semiconductors 2019 (ICNS-13), Bellevue, Washington, AP01.09.

169      Yiyin Zhou, Huong Tran, and Shui-Qing Yu, Wei Du, Joe Margetis, John Tolle, Seyed Ghetmiri, Aboozar Mosleh, Mansour Mortazavi, Greg Sun, Richard Soref, and Baohua Li,  Development of GeSn/SiGeSn Technique towards Integrated Mid-Infrared Photonics Applications, IEEE Research and Applications of Photonics in Defense (RAPID 2019), Miramar Beach, FL, 8/19-8/21, TuD 1.2.

168      Alejandra V. Cuervo Covian, Yiyin Zhou, Xiaoxin Wang, Shui-Qing Yu, Jifeng Liu, Sn Nanodots-Induced Composition Enhancement (NICE) to Achieve 26 at. % Sn in GeSn for Mid-Infrared Integrated Photonics, 2nd Joint ISTDM / ICSI 2019 Conference, 6/2-6/6 (2019), University of Wisconsin-Madison.

167      Development of GeSn Emitters and Detectors towards Integrated Mid-Infrared Photonics Applications, Yiyin Zhou, Huong Tran, and Shui-Qing Yu, Wei Du, Joe Margetis, John Tolle, Seyed Ghetmiri, Aboozar Mosleh, and Mansour Mortazavi, Greg Sun, Richard Soref, and Baohua Li, IEEE Summer Topical Meeting 2019, Fort Lauderdale, Florida.

166      Yiyin Zhou, Joe Margetis, Grey Abernathy, Wei Dou, Perry C Grant, Bader Alharthi, Wei Du, Alicia Wadsworth, Qianying Guo, Huong Tran, Solomon Ojo, Aboozar Mosleh, Seyed A Ghetmiri, Gregory B Thompson, Jifeng Liu, Greg Sun, Richard Soref, John Tolle, Baohua Li, Mansour Mortazavi, Shui-Qing Yu, Investigation of SiGeSn/GeSn/SiGeSn Quantum Well Structures and Optically Pumped Lasers on Si, CLEO 2019 (San Jose): Science and Innovations, STu3N. 3.

165      Huong Tran, Thach Pham, Joe Margetis, Yiyin Zhou, Wei Dou, Perry C Grant, Joshua M Grant, Sattar Alkabi, Wei Du, Greg Sun, Richard A Soref, John Tolle, Baohua Li, Mansour Mortazavi, Shui-Qing Yu, Study of High Performance GeSn Photodetectors with Cutoff Wavelength up to 3.7 µm for Low-Cost Infrared Imaging, CLEO 2019 (San Jose): Science and Innovations, STh4O. 6.

164      Yiyin Zhou, Wei Dou, Wei Du, Solomon Ojo, Huong Tran, Seyed Ghetmiri, Jifeng Liu, Greg Sun, Richard Soref, Joe Margetis, John Tolle, Baohua Li, Zhong Chen, Mansour Mortazavi, Shui-Qing Yu, Si-based Mid-Infrared GeSn-Edge-Emitting Laser with Operating Temperature up to 260 K, CLEO 2019 (San Jose): Applications and Technology, AW3P.3.

163      Yiyin Zhou, Wei Dou, Perry C. Grant, Joe Margetis, Wei Du, Seyed A. Ghetmiri, Aboozar Mosleh, John Tolle, Greg Sun, Richard A. Soref, Jifeng Liu, Baohua Li, Mansour Mortazavi, and Shui-Qing Yu, Silicon-based GeSn Mid-Infrared Lasers, SPIE Photonic West, San Francisco (2019). Proceedings Volume 10939, Novel In-Plane Semiconductor Lasers XVIII; 109390R (2019) https://doi.org/10.1117/12.2506913

2018

162      Samir Kumar Saha, R. Kumar, A. Kuchuk, T. Morgan, P.K. Ghosh, M.Z. Alavijeh, S.-Q. Yu, G. Salamo, III-As Growth on c-plane Sapphire by MBE, MIOMD 2018 (Flagstaff, Arizona), WeA12.

161      S.K. Saha, Rahul Kumar, A. Kuchuk, T. Morgan, P.K. Ghosh, M.Z. Alavijeh, S.-Q. Yu, G. Salamo, Reduction of Twin formation in GaAs/Sapphire Grown by MBE, MIOMD 2018 (Flagstaff, Arizona), WeA11.

160      GePb Alloys for Mid-IR Optoelectronics Applications, Aboozar Mosleh, H. Alahmad, M. Alher, S.F. Banihashemian, S. A. Ghetmiri, S. Al-Kabi, W. Du, B. Li, S.-Q. Yu, H. Naseem, MIOMD 2018 (Flagstaff, Arizona), WeA10.

159      W. Dou, P. Grant, J. Grant, H. Tran, W. Du, M. Mortazavi, B. Li, H. Naseem, S.-Q. Yu, Bader Alharthi, Buffer-free GeSn on Si Substrate by Plasma Enhanced Chemical Vapor Deposition, MIOMD 2018 (Flagstaff, Arizona), WeA9.

158      J. Grant, W. Dou, B. Alharthi, H. Tran, A. Mosleh, W. Du, B. Li, M. Mortizavi, H. Naseem, S.-Q. Yu, Perry Grant, Growth and Characterization of GeSn using UHV‐CVD System, MIOMD 2018 (Flagstaff, Arizona), WeA6.

157      W. Du, SA. Ghetmiri, Y. Zhang, S. El-Ghazaly, J. Margetis, J. Tolle, G. Sun, R. Soref, B. Li, G. Salamo, M. Mortazavi, Shui-Qing Yu, GeSn Lasers and Photodetectors: Key Components for Mid-IR Integrated Microwave Photonics on the SOI Platform, MIOMD 2018 (Flagstaff, Arizona), WeA5.

156      Abbas Sabbar, Syam Madhusoodhanan, Sattar Al-Kabi, Binzhong Dong, Jiangbo Wang , Stanley Atcitty, Robert Kaplar, H. Alan Mantooth, Shui-Qing Yu, and Zhong Chen, High Temperature Photoluminsence of InGaN-based MQWs on Patterned Sapphire Substrates, 31st Annual Conference of the IEEE Photonics Society, Reston, VA, USA (2018).

155      Shui-Qing Yu, Wei Du, Joe Margetis, John Tolle, Seyed Ghetmiri, Aboozer Mosleh, Jifeng Liu, Greg Sun, Richard Soref, and Baohua Li, Investigation of GeSn Lasers towards Group IV Photonics Applications, IEEE Group-IV Photonics 2018 (Cancun, Mexico), NMNP.

154      Shui-Qing Yu, Wei Du, Wei Dou, Yiyin Zhou, Perry Grant, Thach Pham, Huong Tran, Joe Margetis, John Tolle, Seyed Ghetmiri, Aboozer Mosleh, Mansour Mortazavi, Jifeng Liu, Greg Sun, Richard Soref, and Baohua Li, Development of Si-based GeSn Laser, Compound Semiconductor Week 2018, Th2A6.5.

153      Shui-Qing Yu, Wei Du, Mourad Benamara, Seyed Ghetmiri, Aboozar Mosleh, Joe Margetis, John Tolle, Mansour Mortazavi, Jifeng Liu, Greg Sun, Richard Soref, Baohua Li, Development of Si-Based SiGeSn Technique towards Short-Wave and Mid-Infrared Applications, AIMES 2018 (Cancun, Mexico), G03-1021.

152      Takayuki Hironaka, Xian Hu, Jeb Stacy, Ishiang Shih, Jin Hu, Gregory Salamo, Shui-Qing Yu, Hugh Churchill, Exfoliation and characterization of the 1D van der Waals material tellurium, Bulletin of the American Physical Society, P35.00006, 2018.

151      Wei Dou, Yiyin Zhou, Huong Tran, Thach Pham, Perry Grant, and Shui-Qing Yu, Seyed Ghetmiri, Aboozar Mosleh, Wei Du, Joe Margetis, John Tolle, Mansour Mortazavi, Greg Sun, Richard Soref, Huong Tran, Yiyin Zhou, Perry Grant, and Baohua Li, Development of SiGeSn Technique towards Integrated Mid-Infrared Photonics Applications, IEEE Summer Topical Meeting 2018 (Waikoloa), IMIP, MA3.2 (Plenary).

150      Abbas Sabbar, Syam Madhusoodhanan, Binzhong Dong, Jiangbo Wang, Shui-Qing Yu, and Zhong Chen, Investigation of High Temperature Photoluminescence Efficiency from InGaN/GaN MQWs, CLEO 2018 (San Jose): Applications and Technology, JTh2A. 79.

149      Perry C. Grant, Joe Margetis, Yiyin Zhou, Wei Dou, Grey Abernathy, Andrian Kuchuk, Wei Du, Seyed A. Ghetmiri, Baohua Li, John Tolle, Jifeng Liu, Greg Sun, Richard A. Soref, Mansour Mortazavi, Shui-Qing Yu, Direct Bandgap Type-I GeSn Quantum Well toward Si-based Optoelectronics, CLEO 2018 (San Jose): Science and Innovations, STh4I. 4.

148      Huong Tran, Thach Pham, Wei Du, Yang Zhang, Amir Ghetmiri, Perry C. Grant, Joshua M. Grant, Greg Sun, Richard A. Soref, Joe Margetis, John Tolle, Baohua Li, Mansour Mortazavi, and Shui-Qing Yu, Systematic Study of Ge_0.89Sn_0.11 Photodiodes for Low-Cost Shortwave Infrared Imaging, CLEO 2018 (San Jose): Science and Innovations, STh4I. 2.

147      Wei Dou, Yiyin Zhou, Joe Margetis, Seyed Amir Ghetmiri, Wei Du, Jifeng Liu, Greg Sun, Richard A. Soref, John Tolle, Baohua Li, Mansour Mortazavi, and Shui-Qing Yu, Optically Pumped GeSn-edge-emitting Laser with Emission at 3 µm for Si Photonics, CLEO 2018 (San Jose): Applications and Technology, AF1Q. 5.

146      Yang Zhang, Yang Wu, Xiaoxin Wang, Eric R. Fossum, Rahul Kumar, Jifeng Liu, Gregory Salamo, and Shui-Qing Yu, Harnessing Quantum Wave Nature of Individual Electrons for Single Photon Detection, CLEO 2018 (San Jose): QELS_Fundamental Science, FW3F.8.

2017

145      Joe Margetis, John Tolle, Sattar Al-Kabi, Yiyin Zhou, Huong Tran, Thach Pham, Wei Dou, Perry Grant, Shui-Qing Yu, Wei Du, Seyed Ghetmiri, Mansour Mortazavi, Greg Sun, Richard Soref, Baohua Li, GeSn-based Light Sources and Photoconductors towards Integrated Photonics for the Mid-Infrared, 2017 Summer Topicals Meeting Series (10 – 12 July 2017), San Juan, Puerto Rico

144      Jiaju Ma, Yang Zhang, Xiaoxin Wang, Lei Ying, Saleh Masoodian, Zhiyuan Wang, Dakota A. Starkey, Wei Deng, Rahul Kumar, Yang Wu, Seyed Amir Ghetmiri, Zongfu Yu, Shui-Qing Yu, Gregory J. Salamo, Eric R. Fossum, Jifeng Liu, Prospects and fundamental limitations of room temperature, non-avalanche, semiconductor photon-counting sensors, Proc. SPIE 10212, Advanced Photon Counting Techniques XI, 1021209 (9 June 2017)

143      Hakimah Alahmad, Murtath Alher, Sattar Al-Kabi, Seyed Amir Ghetmiri, Aboozar Mosleh, Shui-Qing Yu, Hameed Naseem, Growth and characterization of GePb Alloy using layer inversion method, EMC 2017.

142      P.C. Grant, W. Dou, B. Alharthi, J. Grant, A. Mosleh, W. Du, B. Li, M. Mortizavi, H.A. Naseem, S.-Q. Yu, Dilute GeSn: A study on the Effects of Adding Stannic Chloride to UHV-CVD Growth, EMC 2017.

141      Bader Alharthi, Joshua M. Grant, Wei Dou, Perry C. Grant, Aboozar Mosleh, Wei Du, Mansour Mortazavi, Baohua Li, Hameed Naseem, and Shui-Qing Yu, Low Temperature Ge Growth Using Plasma Enhanced CVD Technique, EMC 2017.

139      Timothy Eales, Igor P. Marko, Seyed A. Ghetmiri, Wei Du, Yiyin Zhou, Shui-Qing Yu, Joe Margetis, John Tolle, Stefan Schulz, Edmond O’Halloran, Eoin P. O’Reilly and Stephen J. Sweeney, New experimental evidence for nature of the band gap of GeSn Alloys, SPIE Photonics West, No. 10108-48, Jan 30-Feb 1, 2017, San Francisco, CA, USA.

138      Wei Du, Seyed Ghetmiri, Sattar Al-Kabia, Aboozar Mosleh, Thach Phama, Yiyin Zhou, Huong Tran, Greg Sun, Richard Soref, Joe Margetis, John Tolle, Baohua Li, Mansour Mortazavi, Hameed Naseem, Shui-Qing Yu, Silicon-based Ge_0.89Sn_0.11 photodetector and light emitter towards mid-infrared applications, SPIE Photonics West, No. 10108-38, Jan 30-Feb 1, 2017, San Francisco, CA, USA.

137      Sattar Al-Kabi, Seyed Amir Ghetmiri, Joe Margetis, Thach Pham, Yiyin Zhou, Wei Dou, Wei Du, Aboozar Mosleh, Jifeng Liu, Greg Sun, Richard A. Soref, John Tolle, Baohua Li, Mansour Mortazavi, Hameed A. Naseem, and Shui-Qing Yu, Optically pumped Si-based edge-emitting GeSn laser, CLEO 2017, SW4C. 1

136      Huong Tran,  Thach Pham, Wei Du, Joe Margetis, Yiyin Zhou,  Perry C. Grant, Greg Sun, Richard A. Soref, John Tolle, Baohua Li, Mansour Mortazavi,  Hameed A. Naseem,  and Shui-Qing Yu, Temperature Dependent Study of Lifetime and Minority Carrier Diffusion Constant for Ge_0.89Sn_0.11 Photoconductors, CLEO 2017, STu1N. 6

135      Wei Du, Seyed Ghetmiri, Sattar Al-Kabi, Joe Margetis, Yiyin Zhou, Wei Dou, Aboozar Mosleh, Jifeng Liu, Greg Sun, Richard Soref, John Tolle, Baohua Li, Mansour Mortazavi, , and Shui-Qing Yu, Study of SiGeSn/GeSn/SiGeSn Quantum Well towards All Group-IV-Optoelectronics, CLEO 2017, STh3I. 3

2016

134      Joe Margetis, Aboozar Mosleh, Seyed Amir Ghetmiri, Nupur Bhargava, Shui-Qing Yu, and John Tolle, Ge_1-xSn_x and Si_yGe_1-x-ySn_x epitaxy on a commercial CVD reactor, 7th International Symposium on Control of Semiconductor Interfaces & International SiGe Technology and Device Meeting, Nagoya, Japan, June 7-11 (2016).

133      Timothy Eales, Igor P. Marko, Seyed A. Ghetmiri, Wei Du, Yiyin Zhou, Shui-Qing Yu, Stefan Schulz, Eoin P. O’Reilly, and Stephen J. Sweeney, “GeSn Alloys for Mid-infrared Optoelectronics”, the 13th International Conference on Mid-Infrared Optoelectronics: Materials and Devices, Beijing, China, September 18-22 (2016).

132      Bader Alharthi, Aboozar Mosleh, Joe Margetis, Sattar Al-Kabi, Seyed Amir Ghetmiri, Houng Tran, Wei Du, Mourad Benamara, Mansour Mortazavi, John Tolle, Hameed Naseem, Shui-Qing Yu, “CVD growth of SiGeSn Alloys for Higher Efficiency Multi-Junction Solar Cells”, the 43rd IEEE Photovoltaic Specialists Conference, Portland, OR, USA, June 5-10 (2016).

131      Huong Tran, Thach Pham, Yiyin Zhou, Seyed Ghetmiri, Sattar Al-Kabi, Aboozar Mosleh, Hameed Naseem, Shui-Qing Yu, John Tolle, Joe Margetis, Wei Du, Mansour Mortazavi, Richard Soref, Greg Sun, and Baohua Li, “Investigation of Si-based Ge0.93Sn0.07 Photoconductors towards Short-wave Infrared Detection”, IEEE Summer Topicals Meetings, Newport Beach, CA, USA, July 11-13 (2016).

130      W. Du, S. Al-Kabi, S. Ghetmiri, H. Tran, T. Pham, B. Alharthi, A. Mosleh, J. Margetis, J. Tolle, H. Naseem, M. Mortazavi, G. Sun, R. Soref, B. Li, and S. -Q. Yu, “Development of SiGeSn Technique towards Mid-Infrared Devices in Silicon Photonics”, Electrochemical Society Falling Meeting, Honolulu, HI, USA, October 02-07 (2016).

129      Joe Margetis, John Tolle, Wei Du, Aboozar Mosleh, Sayed A. Ghetmiri, Hameed Naseem, and Shui-Qing Yu, “Ge1-xSnx and SiyGe1-x-ySnx epitaxy on a commercial CVD reactor”, IEEE Summer Topicals Meetings, Newport Beach, CA, USA, July 11-13 (2016).

128      Wei Dou, Seyed Amir Ghetmiri, Sattar Al-Kabi, Aboozar Mosleh, Wei Du, Greg Sun, Richard Soref, John Tolle, Joe Margetis, Baohua Li, Mansour Mortazavi, Hameed Naseem, Shui-Qing Yu, CVD Grown Pseudomorphic GeSn/GeSn and SiGeSn/GeSn Single Quantum Wells, the 58th Electronic Materials Conference, Newark, DE, USA, June 22-24 (2016).

127      Sattar Al-Kabia, Seyed Amir Ghetmiria, Joe Margetisb, Aboozar Mosleha, Wei Dou, Wei Du,  Greg Sun, Richard Soref, John Tolle, Baohua Li, Mansour Mortazavi, Hameed A. Naseem,  Shui-Qing, Yu, High Quality CVD Grown Thick GeSn Samples with Enhanced Photoluminescence Intensity, the 58th Electronic Materials Conference, Newark, DE, USA, June 22-24 (2016).

126      Yiyin Zhou, Wei Du, Wei Dou, Thach Pham, Aboozar Mosleh, Seyed Amir Ghetmiri,  Sattar Al-Kabi, Joe Margetis, John Toll,4Greg Sun, Richard Soref, Baohua Li, Mansour Mortazavi, Hameed Naseem, and Shui-Qing Yu, “Systematic Study of Si based Ge_0.9Sn_0.1 Light-Emitting Diode towards Mid-Infrared Application”, the Conference On Lasers and Electrooptics (CLEO), No. JW2A.127, San Jose, CA, USA, June 5-10 (2016).

125      Thach Pham, Wei Du, Huong Tran, Joe Margetis, John Tolle, Greg Sun, Richard A. Soref, Hameed A. Naseem, Baohua Li, Mansour Mortazavi, and Shui-Qing Yu, “Systematic study of Si-based Ge/Ge_0.9Sn_0.1/Ge photodiodes with 2.6 µm detector cutoff”, the Conference On Lasers and Electrooptics (CLEO), No. STh1G.7, San Jose, CA, USA, June 5-10 (2016).

124      Wei Du, Seyed Ghetmiri, Sattar Al-Kabi, Aboozar Mosleh, Joe Margetis, John Tolle, Greg Sun, Richard A. Soref, Baohua Li, Hameed A. Naseem, Shui-Qing Yu, and Mansour Mortazavi, “Optical study of Ge_0.95Sn_0.05/Ge_0.9Sn_0.1/Ge_0.95Sn_0.05 quantum well towards group-IV based light source on Si”, the Conference On Lasers and Electrooptics (CLEO), No. SF1P.4, San Jose, CA, USA, June 5-10 (2016).

2015

123      A. Mosleh, M. Alher, L. Cousar, H. Abu-safe, W. Dou, P. C. Grant, S. Al- Kabi,, S.A. Ghetmiri, B. Alharthi, H. Tran, W. Du, M. Benamara, B. Li ,M. Mortazavi, S.-Q. Yu, and H. Naseem, Enhancement of Material Quality of (Si)GeSn Films Grown By SnCl₄ Precursor, 2015 ECS fall (228^th meeting), October 11-16, Phoenix, AZ (2015)

122      M. Alher, A. Mosleh, L. Cousar, W. Dou, P. C. Grant, S.A. Ghetmiri, S. Al-Kabi, W. Du, M. Benamara, B. Li, M. Mortazavi, S.-Q. Yu, and H. A. Naseem, CMOS Compatible Growth of High Quality Ge, SiGe and SiGeSn for Photonic Device Applications, 2015 ECS fall (228^th meeting), October 11-16, Phoenix, AZ (2015).

121      Sattar Al-Kabi, Seyed Amir Ghetmiri, Wei Du, Huong Tran, Greg Sun, Richard Soref, John Tolle, Joe Margetis, Baohua Li,   Hameed A. Naseem, and  Shui-Qing Yu, Material and Optical Characterizations for Both Bulk and NIP Double Heterostructure of Germanium Tin, 2015 Electronic Material Conference, June 24~26, Columbus, OH (2015).

120      Aboozar Mosleh, Murtadha Alher, Wei Du, Larry C. Cousar, Seyed Amir Ghetmiri, Sattar Al-Kabi, Wei Dou,1 Perry C. Grant, Benjamin R. Conley, Greg Sun, Richard A. Soref, Baohua Li, Hameed A. Naseem, and Shui-Qing Yu, Growth and characterization of buffer-free SiGeSn epitaxial layers on Si for photonic applications, 2015 Electronic Material Conference, June 24~26, Columbus, OH (2015).

119      Shui-Qing Yu, and Wei Du, Si based mid-infrared GeSn photo detectors and light emitters on silicon substrates, 2015 SPIE Optical Sensing, Imaging and Photon Counting—Nanostructured Devices and Applications, 9555-16, August 9-13, 2015, San Diego, CA, USA.

118      Thach Pham, Benjamin R. Conley, Joe Margetis, Huong Tran, Seyed Amir Ghetmiri, Aboozar Mosleh, Wei Du, Greg Sun, Richard A Soref, John Tolle, Hameed A. Naseem, Baohua Li, and Shui-Qing Yu, Enhanced responsivity up to 2.85 A/W of Si-based Ge_0.9Sn_0.1 photoconductors by integration of interdigitated electrodes, the Conference On Lasers and Electrooptics (CLEO) 2015, STh1I.7, May 10-15, 2015, San Jose, CA, USA.

117      Seyed Amir Ghetmiri, Wei Du, Yiyin Zhou, Joe Margetis, Thach Pham, Aboozar Mosleh, Benjamin R. Conley, Greg Sun, Richard Soref, John Tolle, Hameed A. Naseem, Baohua Li, and Shui-Qing Yu, Temperature-dependent characterization of Ge_0.94Sn_0.06 Light-Emitting Diode grown on Si via CVD, the Conference On Lasers and Electrooptics (CLEO) 2015, ATu1J.6, May 10-15, 2015, San Jose, CA, USA.

116      Wei Du, Seyed A. Ghetmiri, Yiyin Zhou, Aboozar Mosleh, Joe Margetis, John Tolle, Greg Sun, Richard A. Soref, Baohua Li, Hameed Naseem, and Shui-Qing Yu, Si-Based GeSn Edge-Emitting LEDs with Sn Compositions up to 8%, 2015 IEEE Summer Topicals, July 13-15, Nassau, Bahamas (2015).

115      S.-Q. Yu, S. A. Ghetmiri, W. Du, J. Margetis, Y. Zhou, A. Mosleh, S. Al-Kabi, A. Nazzal, G. Sun, R.A. Soref, J. Tolle, B. Li, and H.A. Naseem, Si based GeSn light emitter: mid-infrared device in Si photonics, SPIE Photonics West, No. 9367-26, February 7-12, 2015, San Francisco, CA, USA.

114      Thach Pham, Wei Du, Joe Margetis, Seyed Amir Ghetmiri, Aboozar Mosleh, Greg Sun, Richard A Soref, John Tolle, Hameed A. Naseem, Baohua Li, and Shui-Qing Yu, Temperature-dependent study of Si-based GeSn photoconductors, SPIE Photonics West, No. 9367-27, February 7-12, 2015, San Francisco, CA, USA

2014

113      Perry C. Grant, Wei Dou, Dongsheng Fan, Yuriy I. Mazur, Vitaliy Dorogan, Shui-Qing Yu, Gregory J. Salamo, Band offsets in GaAs_1-xBi_x (0<x<3.6%) Grown by Molecular Beam Epitaxy, 18^th International MBE conference, Flagstaff, Arizona (2014)

112      Thach Pham, Benjamin R. Conley, Liang Huang, Wei Du, Richard A Soref, Greg Sun, Joe Margetis, John Tolle, Hameed A. Naseem, and Shui-Qing Yu, Enhanced responsivity by integration of interdigitated electrodes on Ge_0.93Sn_0.07 infrared photodetectors, IEEE Photonics Conference, San Diego  (2014).

111      Yiyin Zhou, Wei Du, Seyed Amir Ghetmiri, Aboozar Mosleh, Amjad Nazzal, Richard A Soref, Greg Sun, Joe Margetis, John Tolle, Hameed A. Naseem, and Shui-Qing Yu, Room-temperature electroluminescence from Ge/Ge0.92Sn0.08/Ge double heterostructure LED on Si, IEEE Photonics Conference, San Diego (2014).

110      Aboozar Mosleh, Seyed Amir Ghetmiri, Benjamin R. Conley, Wei Du, John Tolle, Shui-Qing Yu, and Hameed A. Naseem, Strain Relaxation and Material Quality Improvement of Compressively Strained GeSn Epitaxial Films Through Cyclic Rapid Thermal Annealing Process, submitted to IEEE Summer Topicals Meeting Series, Montreal (2014).

109      Benjamin R. Conley, Aboozar Mosleh, Seyed A. Ghetmiri, Wei Du, John Tolle, Joe Margetis, Richard A. Soref, Greg Sun, Hameed Naseem, and Shui-Qing Yu, Temperature Dependent Spectral Response and Responsivity of GeSn Photoconductor on Si, IEEE Summer Topicals Meeting Series, Montreal (2014).

108      Wei Du, Seyed Amir Ghetmiri, Aboozar Mosleh, Benjamin R. Conley, Liang Huang, Amjad Nazzal, Richard A. Soref3 Greg Sun, John Tolle, Joe Margetis, Hameed A. Naseem, and Shui-Qing Yu, Direct transition Ge_0.94Sn_0.06 PIN-diode double heterostructure light emitter at high injection, submitted to the 11th International Conference on Group IV Photonics, Paris (2014).

107      Benjamin R. Conley, Yiyin Zhou, Aboozar Mosleh, Seyed Amir Ghetmiri, Wei Du, Richard A Soref, Greg Sun, Joe Margetis, John Tolle, Hameed A. Naseem, and Shui-Qing Yu, Infrared spectral response of a GeSn p-i-n photodiode on Si, in the 11th International Conference on Group IV Photonics, Paris (2014).

106      Aboozar Mosleh, Seyed Amir Ghetmiri, Benjamin R. Conley, Husam Abu-Safe, Zafar Waqar, Mourad Benamara, Samir El-Ghazaly, Shui-Qing Yu, Hameed A. Naseem, Investigation of growth mechanism and role of H₂ in very low temperature Si epitaxy, in the 226th ECS Fall Meetings, 2014.

105      A.Mosleh, M. Benamara, S.A. Ghetmiri, B. Conley, W. Du, J. Tolle, S.-Q. Yu, H. Naseem, Investigation of defect formation and propagation in GeSn thin films, in the 226th ECS Fall Meetings, 2014.

104      Benjamin R. Conley, Aboozar Mosleh, Seyed Amir Ghetmiri, Wei Du, Greg Sun, Richard Soref, John Tolle, Joe Margetis, Hameed A. Naseem, and Shui-Qing Yu, Stability of pseudomorphic and compressively strained GeSn thin films under rapid thermal annealing, in the 226th ECS Fall Meetings, 2014.

103      John Tolle, Joe Margetis, Seyed A. Ghetmiri, Aboozar Mosleh, Benjamin R. Conley, Wei Du, Amjad Nazzal, Richard A. Soref, Greg Sun, Hameed A. Naseem and Shui-Qing Yu, Growth and characterization of Ge_1-xSn_x alloys deposited using a commercial CVD system, in the 226th ECS Fall Meetings, 2014.

102      Wei Du, Seyed Amir Ghetmiri, Aboozar Mosleh, Benjamin R. Conley, Liang Huang, Amjad Nazzal,   Richard A Soref, Greg Sun, John Tolle, Hameed A. Naseem, and Shui-Qing Yu, Investigation of Photoluminescence from Ge_1-xSn_x: A CMOS-Compatible Material Grown on Si via CVD, the Conference On Lasers and Electrooptics (CLEO), No. JW2A.57, San Jose, CA, USA, June 8-13, 2014.

101      Benjamin R. Conley, Liang Huang, Seyed Amir Ghetmiri, Aboozar Mosleh, Wei Du, Greg Sun, Richard Soref, John Tolle, Hameed A. Naseem, and Shui-Qing Yu, Extended Infrared Absorption to 2.2 µm with Ge_1-xSn_x Photodetectors Grown on Silicon, the Conference On Lasers and Electrooptics (CLEO), No. SM2H.5, San Jose, CA, USA, June 8-13, 2014.

100      Seyed Amir Ghetmiri, Benjamin R. Conley, Aboozar Mosleh, Liang Huang, Wei Du, Amjad Nazzal, Greg Sun, Richard Soref, John Tolle, Hameed A. Naseem, and Shui-Qing Yu, Photoluminescence from GeSn/Ge Heterostructure Microdisks with 6% Sn Grown on Si via CVD, the Conference On Lasers and Electrooptics (CLEO), No. AW1H.2, San Jose, CA, USA, June 8-13, 2014.

2013

99  Perry C. Grant, Dongsheng Fan, Aboozar Mosleh, Vitaliy G. Dorogan, Michael E. Hawkridge, Yuriy I. Mazur, Mourad Benamara, Shui-Qing Yu, Gregory J. Salamo, Photoluminescence Studies of the Effects of Rapid Thermal Annealing on Molecular Beam Epitaxy Grown GaAs_1-xBi_x/GaAs Heterostructures, 30th North American Molecular Beam Epitaxy Conference (NAMBE), Banff, Alberta (October 5-11, 2013).

98  Yu. I. Mazur, V. G. Dorogan, L. D. de Souza, D. Fan, M. Benamara, M. Schmidbauer, M. E. Ware, G. G. Tarasov, S.-Q. Yu, G. E. Marques, and G. J. Salamo, Effect of AlGaAs cladding on the luminescent properties of GaAs/GaAs_1-xBi_x/GaAs heterostructures, 4th International Workshop on Bismuth-Containing Semiconductors (4th BCS), Fayetteville, AR, USA (July14-17, 2013).

97  Chen Li, Zhaoquan Zeng, Dongsheng Fan, Yusuke Hirono, Jiang Wu, Timothy A. Morgan, Xian Hu, Shuiqing Yu, Zhiming M. Wang, and Gregory J. Salamo, Nanostructures induced by bismuth nano-droplets using molecular beam epitaxy, 4th International Workshop on Bismuth-Containing Semiconductors (4th BCS), Fayetteville, AR, USA (July14-17, 2013).

96  P.C. Grant, D. Fan, A. Mosleh, M. Hawkridge, Y. Mazur, M. Benemara, V. Dorogan, S.-Q. Yu, G. Salamo, Investigation of Rapid Thermal Annealing on GaAs_1-xBi_x/GaAs Heterostructures, 4th International Workshop on Bismuth-Containing Semiconductors (4th BCS), Fayetteville, AR, USA (July14-17, 2013).

95  Hui Zhong, Husam Abu-Safe, Alan Hickerson, Benjamin R. Conley, Hameed Naseem, Shui-Qing Yu, Crystallization of Patterned Amorphous Si and Ge Thin Films for 3D Integrated Optoelectronics, IEEE Group IV Photonics conference, Korea (2013).

94  Aboozar Mosleh, Seyed Amir Ghetmiri, Benjamin R. Conley, Shui-Qing Yu, Hameed A. Naseem, Mourad Benamara, John Tolle, Strain Engineering of high quality CVD grown GeSn films for optoelectronic devices, EMC conference (2013).

93  Liang Huang, Huixu Deng, Thach Pham, Matthew Young, Hameed Naseem, Husam Hamza Abu-Safe, Xiaodong Yang, Shui-Qing Yu, Amorphous Silicon Solar Cells Using Metallic Fishnet Nanostructures Simultaneously for Schottky Contact and Plasmonics Enhancement EBL, IEEE PVSC Conference, Tampa, FL, USA (2013)

92  B. R. Conley, A. Mosleh, S. Ghetmiri, H A. Naseem, J. Tolle, S.-Q Yu, CVD Growth of Ge_1-xSn_x Using Large Scale Si Process for Higher Efficient Multi-Junction Solar Cells, IEEE PVSC Conference, Tampa, FL, USA (2013).

91  A. Mosleh, Z. Waqar, S.-Q  Yu, H. Abu-Safe, S. Ghetmiri, B. R. M. Benamara, H. A. Naseem, Nucleation-step study of silicon homoepitaxy for low-temperature fabrication of solar cells, IEEE PVSC Conference, Tampa, FL, USA (2013).

90  Husam Abu-Safe, Alan Hickerson, Hameed Naseem, and Shui-Qing Yu, Selected Area Crystallization of Amorphous Si and Ge Thin Films on Glass Substrates for Solar Cell and 3D-Optoelectronic Applications, IEEE PVSC Conference, Tampa, FL, USA (2013).

89  Matthew Young, Benjamin Newton, Husam Abu-Safe, Shui-Qing Yu, Hameed Naseem, Fabrication of Al Nanodots by Electron Beam Evaporation, IEEE PVSC Conference, Tampa, FL, USA (2013).

88  Seth Shumate, Matthew G. Young, Hafeezuddin M. Khaja, Douglas Hutchings, Larry Cousar, Shui-Qing Yu, and Hameed Naseem, Progress on the Hydrogen Selective Emitter for N-type solar cells, IEEE PVSC Conference, Tampa, FL, USA (2013).

87  Seth Shumate, Hafeezuddin M. Khaja, Douglas Hutchings, Shui-Qing Yu, and Hameed Naseem, IEEE PVSC Conference, Tampa, FL, USA (2013).

2012

86  Benjamin R. Conley, Hameed Naseem, Greg Sun, Paul Sharps, Shui-Qing Yu, High Efficiency MJ Solar Cells and TPV Using SiGeSn Materials, IEEE PVSC Conference, Austin, TX, USA (2012).

85  B. Newton, Husam, Abu Safe H, M, Benemara, S.-Q. Yu, H. Naseem, Fabrication of Site Specific Amorphous/NanoCrystalline Silicon Composite Thin Film for Solar Cells, IEEE PVSC Conference, Austin, TX, USA (2012).

84  Liang Huang, Husam Hamza Abu-Safe, Matthew Young, Seth Shumate, Benjamin Newton, Hameed Naseem and Shui-Qing Yu, Fabrication and Characterization of c-Si Solar Cells Integrated with Ordered Metallic Nanostructure Arrays, IEEE PVSC Conference, Austin, TX, USA (2012).

83  M.G Young, M. Benamara, H. Abu-Safe, S.-Q. Yu, H.A. Naseem, a-Si:H/c-Si Nanocomposite Material for Solar Cells Fabricated from PECVD, IEEE PVSC Conference, Austin, TX, USA (2012).

82  SD Shumate, D.A. Hutchings, M. K. Hafeezuddin, G. Beilke, B. Newton, M. Young, H. Abu-Safe, S.-Q. Yu, H. Naseem, SELF ALIGNED HYDROGENATED SELECTIVE EMITTER FOR N-TYPE SOLAR CELLS, IEEE PVSC Conference, Austin, TX, USA (2012

81  Asmaa Elkadi, Emmanuel Decrossas, Shui-Qing Yu, Hameed Naseem and Samir M. El-Ghazaly, Controlling the Band Gap of Aligned Semiconducting Single-Walled Carbon Nanotubes for THz Modulator, in Proceeding of European Microwave Week (2012).

80  Dongsheng Fan, Zhaoquan Zeng, Xian Hu, Vitaliy G. Dorogan, Yusuke Hirono, Chen Li, P. C. Grant, Mourad Benamara, Mike Hawkridge, Yuriy I. Mazur, Shui-Qing Yu, Shane R. Johnson, Zhiming M. Wang, Gregory J. Salamo, High Optical Quality GaAsBi/GaAs/AlGaAs Separate Confinement Heterostructures, 17th International Conference on Molecular Beam Epitaxy (MBE 2012), Nara, Japan (September 23-28, 2012).

79  Hameed Naseem, Shui-Qing Yu, Samir El-Ghazaly, Zafar Waqar, Husam Abu-Safe, Shannen Adcock, Ben Conley, Salman Mosleh, Bryant Hankton, Asanka Munasinghe, Safety Considerations in Building Ultra-high Vacuum Plasma Enhanced Chemical Vapor Deposition System for Low Temperature Group IV Epitaxy, University Government Industry Micro Nano Symposium, Berkeley, CA (2012).

 

78  S. Shumate, M. Young, B. Newton, E. Porter, S-Q. Yu, H. Naseem, Hands-on training in the design and fabrication of N-type solar cells, University Government Industry Micro Nano Symposium, Berkeley, CA (2012).

 

77  D. Fan, , Z. Zeng, X. Hu, V. G. Dorogan, Y. Hirono, C. Li, P. C. Grant, M. Benamara, M. E. Hawkridge, Yu, I. Mazur, S.-Q. Yu, S. R. Johnson, Zh. M. Wang, and G. J. Salamo, Molecular Beam Epitaxy Growth of GaAsBi/GaAs/AlGaAs Separate Confinement Heterostructures, 3rd International Workshop on Bismuth-Containing Semiconductors (3rd BCS), Victoria B.C., Canada (July15-18, 2012).

76  D. Fan, , P. C. Grant, Z. Zeng, X. Hu, C. Li, V. G. Dorogan, M. E. Hawkridge, Yu, I. Mazur, S.-Q. Yu, S. R. Johnson, Zh. M. Wang, and G. J. Salamo, GaAsBi/GaAs Multiple Quantum Wells Grown by Molecular Beam Epitaxy, 29th North American Molecular Beam Epitaxy Conference (NAMBE), Atlanta GA (October 14-17, 2012).

75  Mohammad Ali Khorrami, Samir El-Ghazaly, Shui-Qing Yu, Hammed Naseem, Active Terahertz Surface Plasmon Switch inside the Two Dimensional Electron Gas of a Hetero-structure, IMS 2012.

74  Zhaoquan Zeng, Chen Li, Dongsheng Fan, Yusuke Hirono, Timothy A. Morgan, Xian Hu, Jian Wang, Joon Sue Lee, Zhiming M. Wang, Shui-Qing Yu, Aqiang Guo, Gregory J. Salamo, Fabrication of Bi₂Te₃ Nanodots by Droplet Epitaxy on GaAs substrates, APS Annual Meeting, Dallas, TX, USA (2012).

73  Dongsheng Fan, Jiang Wu, Zhiming M. Wang, Shui-Qing Yu, Gregory J. Salamo, InAs QD light emitting diodes on in-situ nano-patterned substrates using Molecular Beam Epitaxy, SPIE Photonic West, San Francisco, CA (2012).

72  Dongsheng Fan, Zhaoquan Zeng, Zhiming M. Wang, Shane R. Johnson, Shui-Qing Yu, Gregory J. Salamo, Molecular Beam Epitaxy Grown GaInAsSbBi alloys on GaSb substrates for mid-infrared laser diode applications, SPIE Photonic West, San Francisco, CA (2012).

2011

71  Dongsheng Fan, Zhaoquan Zeng, Vitaliy G. Dorogan, Yusuke Hirono, Chen Li, Yuriy I. Mazur, Zhiming M. Wang, Shane R. Johnson, Shui-Qing Yu, Gregory J. Salamo, Photoluminescence and Surface Morphology Characterization of GaAsBi Grown on GaAs, in 28th North American Molecular Beam Epitaxy Conference, San Diego, CA (2011).

70  Zhaoquan Zeng, Dongsheng Fan, Chen Li, Yusuke Hirono, Timonthy A. Morgan, Zhiming M. Wang, Shui-Qing Yu, Aqiang Guo, Gregory J. Salamo, Epitaxial Growth of High-quality Bi₂Te₃ and Sb₂Te₃ Thin Films on GaAs (111), MRS fall meeting, Boston, MA (2011)

69  Dongsheng Fan, Zhaoquan Zeng, Vitaliy G. Dorogan, Yusuke Hirono, Chen Li, Yuriy I. Mazur Zhiming M. Wang, Shane R. Johnson, Shui-Qing Yu, Gregory J. Salamo, Bismuth surfactant mediated growth of InAs quantum dots by Molecular Beam Epitaxy, Boston, MA (2011).

68  A. Guo, C. Furrow, Vas. P. Kunets, S.-Q. Yu , G. Salamo, G. A. Sivologlou, R. El-Ganainy, K. G. Markris, D. N. Christodoulids, D. Duchesne, R. Morandotti, M. Volatier-Ravat, V. Aimez, Observation of a Passive PT Phase Transition, in APS MARCH MEETING 2011, MAR11-2010-000974, session Y45, (Atom Interactions with Molecules, Surfaces, and X-Rays).

67  D. Fan, S.-Q. Yu, Z.M. Wang, S.R. Johnson and G. J. Salamo, Novel GaInAsSbBi Materials for Mid-Infrared Type-I Quantum Well Lasers, The Second International Workshop on Bismuth-Containing Semiconductors: Theory, Simulation and Experiment, Guildford, UK (July 18-20, 2011).

66  M. Khorrami, S. El-Ghazaly, S.-Q. Yu, H. Naseem, Analytical modeling of THz wave propagation inside ungated two dimensional electron gas layers, IMS2011.

65  N. Hossain, K. Hild, S. R. Jin, S. J. Sweeney, S.-Q. Yu, S. R. Johnson, D. Ding, and Y. H. Zhang, Temperature Dependence and Physical Properties of GaAsSb/GaAs QW Lasers, Photonics West, San Francsico, CA, USA (2011).

64  Newton, B., H.K. Mohammed, H. Abu-Safe, S.-Q. Yu, H.A. Naseem, Fabrication of Aluminum Nanodot Assisted Growth of Nanoroots for Application in Amorphous/Crystalline Silicon Composite Thin Film Solar Cells, International Conference on Metallurgical Coatings and Thin Films, San Diego, CA, USA (2011)

2010

63  Hossain, N., K. Hild, S. R. Jin, S. J. Sweeney, S.-Q. Yu, S. R. Johnson, D. Ding, and Y. H. Zhang, Role of growth temperature on the physical characteristics of GaAsSb/GaAs QW lasers, Proceedings of IEEE Photonics Society 23^rd Annual Meeting, Denver, USA, pp. 59-60 (2010).

62  N. Hossain, K. Hild, S. J. Sweeney, S.-Q. Yu, S. R. Johnson, D. Ding, and Y. H. Zhang, Influence of Device Structures on Carrier Recombination in GaAsSb/GaAs QW Lasers, Proceedings of Photonics Global Conference Singapore, pp. 1-3 (2010).

61  N. Hossain, S. R. Jin, S. J. Sweeney, S.-Q. Yu, S. R. Johnson, D. Ding, and Y. H. Zhang, Improved Performance of GaAsSb/GaAs SQW Lasers, Proceedings of SPIE USA, Vol. 7616, pp. 1-5, San Jose, CA (2010).

60  D. Ding, S. R. Johnson, S.-N. Wu, S.-Q. Yu, Y.-H. Zhang, A practical guide to photovoltaic solar cell design, SPIE Photonic West, San Francisco, CA (Jan 26-28, 2010).

59  S.-N. Wu, S.-Q. Yu, S. R. Johnson, D. Ding, Y.-H. Zhang, Practical devices for semiconductor luminescent refrigeration, SPIE Photonic West, San Francisco, CA (Jan 26-28, 2010).

58  S.-N. Wu, S.-Q. Yu, S. R. Johnson, D. Ding, Y.-H. Zhang, Ultrahigh extraction efficiency of a semiconductor hemisphere for LED applications, SPIE Photonic West, San Francisco, CA, (Jan 26-28, 2010).

2009

57  Shane R. Johnson, Rajesh Atluri, Ding Ding, Shui-Qing Yu, Yong-Hang Zhang, Nonradiative Losses and Cooling Performance in Semiconductor Based Luminescence Refrigerators, SPIE Photonics West (2009).

2008

56  D. Ding, S.-N. Wu, S. Wang, S. R. Johnson, S.-Q. Yu, X. Liu, J. K. Furdyna, and Y.-H. Zhang, Multi-junction Solar Cells Based on the Integration of II/VI and III/V Semiconductors, IEEE LEOS Annual Meeting (2008).

55  S. J. Sweeney, K. Hild, I. P. Marko, S.-Q. Yu, S. R. Johnson and Y.-H. Zhang, Thermal Characteristics of 1.3um GaAsSb/GaAs-based Edge- and Surface-Emitting Lasers, 21st IEEE International Semiconductor Laser Conference, P5, Sorrento, Italy (Sep 2008).

54  Shumin Wang, Song-Nan Wu, Ding Ding, Xinyu Liu, Xiao-Bo Zhang, Shane R. Johnson, Shui-Qing Yu, Jacek K. Furdyna, David J. Smith, and Yong-Hang Zhang, Multijunction solar cells using monolithically-integrated and lattice-matched II/VI and III/V materials, 23^rd EU PVSEC, 1AO4.1, Proceeding 30-33 (Sep, 2008).

53  S.-N. Wu, S.-Q. Yu, D. Ding, S. R. Johnson, and Y.-H. Zhang, Luminescence coupling in direct-bandgap multi-junction solar cells, SPIE Annual Meeting, Optics and Photonics, San Diego (Aug, 2008).

52  S. R. Johnson, D. Ding, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, Measurement and Improvement of Nonradiative Losses in MBE Grown III-V Semiconductors, 26^th North American Conference on Molecular Beam Epitaxy, Vancouver, CA (Aug, 2008).

51  Shane R. Johnson, Ding Ding, Jiang-Bo Wang, Shui-Qing Yu, Yong-Hang Zhang, Measurement and Improvement of Quantum Efficiency in III-V Semiconductors, Electronic Materials Conference, Santa Barbara, CA (June, 2008).

50  B. C. Green, S.–Q. Yu, S. J. Sweeney, D. Ding, Y.–H. Zhang, Novel heterostructure design for increased spectral width of superluminescent diodes (SLDs) and dual-wavelength laser diodes, Device Research Conference, Santa Barbara, CA (June, 2008).

49  Y.-H. Zhang, S.-Q. Yu, S. R. Johnson, D. Ding, S.-N. Wu, S. Wang, X. Liu, J. K. Furdyna, Monolithically integrated multijunction solar cells using II/VI and III/V materials lattice matched to GaSb or InAs substrates, 2008 Space Power Workshop (April, 2008).

47  S. Wang, X. Liu, D. Ding, S.-N. Wu, S. R. Johnson, S.-Q. Yu, J. K. Furdyna, Y.-H. Zhang, Lattice matched ZnTe and CdZnTe/ZnTe heterostructures grown on GaSb for multijunction solar cell applications, 33rd IEEE Photovoltaic Specialists Conference (San Diego, 2008).

46  Y.-H. Zhang, S.-N. Wu, D. Ding, S.-Q. Yu, S. R. Johnson, A Proposal of Monolithically Integrated Multijunction Solar Cells Using Lattice-matched II/VI and III/V Semiconductors, Proceeding of the 33rd IEEE Photovoltaic Specialists Conference, p20 (2008).

45  D. Ding, S. R. Johnson, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, Measurement of Spontaneous Emission Quantum Efficiency in InGaAs/GaAs Quantum Wells, Conference on Lasers and Electro-Optics, CLEO/IQEC, CTHKK3 (2008).

44  S.-Q. Yu, Y. Cao, S. R. Johnson, Y.-H. Zhang, Y.-Z. Huang, Equilateral-triangle-resonator mid-infrared laser diodes, Conference on Lasers and Electro-Optics, CLEO/IQEC (2008).

43  H.-X. Liu, S.-Q. Yu, D. Ding, S. R. Johnson, Y.-H. Zhang, Nanosecond Time-Resolved Spectroscopy Measurement for Studies of Semiconductor Electroluminescence Refrigeration, SPIE Photonics West (2008).

42  S.-Q. Yu, D. Ding, N. Rider, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, Fabrication and optimization of high extraction-efficiency semiconductor optical structures for electroluminescence refrigeration, SPIE Photonics West (2008).

41  B. C. Green, S.-Q. Yu, J.-B. Wang, X. Li, Y.-H. Zhang, Broad spectrum superluminescence diodes utilizing internal optical pumping of additional gain regions and separate quasi-Fermi levels, SPIE Photonics West (2008).

40  S.-N. Wu, S.-Q. Yu, D. Ding, S. R. Johnson, Y.-H. Zhang, Impact of photon recycling and spontaneous emission coupling on multi-junction solar cell design, SPIE Photonics West (2008).  (Highlighted by Laser Focus World for a preview article of Photonic West 2008, Selected from 3100 contributed abstracts)

2007

39  S. R. Johnson, D. Ding, S.-Q. Yu, Y.-H. Zhang, Theoretical limits of light extraction and its impact on LED wall-plug efficiency, SPIE Photonics Asia (2007).

38  S. R. Johnson, D. Ding, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, A fundamental technique for the measurement of quantum efficiency in direct bandgap semiconductors, SPIE Photonics Asia (2007).

37  S. R. Johnson, D. Ding, S.-Q. Yu, Y.-H. Zhang, Fundamental limits of luminescence extraction and its impact on semiconductor luminescence refrigeration, SPIE Photonics West (2008).

36  R. Roucka, S.-Q. Yu, J. Tolle, Y.y. Fang, S.-N. Wu, J. Menéndez, and J. Kouvetakis, Photoresponse at 1.55 μm in GeSn epitaxial films grown on, SPIE Photonics West (2008).

35  R. Roucka, S.-Q. Yu, J. Tolle, Y.y. Fang, S.-N. Wu, José Menéndez, and J. Kouvetakis, Photoresponse at 1.55 μm in GeSn epitaxial films grown on, IEEE LEOS Annual Meeting (2007).

34  S. R. Johnson, D. Ding, J.-B. Wang, S.-Q. Yu, Y.-H. Zhang, Improvement of Spontaneous Emission Quantum Efficiency in GaAs/AlGaAs Heterostructures Using Sb-Mediated Molecular Beam Epitaxy, Submitted to 25^th North American Conference on Molecular Beam Epitaxy (2007).

33  D. Ding, J.-B. Wang, S. R. Johnson, S.-Q. Yu, Y.-H. Zhang, Determination of Internal Quantum Efficiency in Semiconductors Suitable for Luminescence Refrigeration, Symposium on Nano and Giga Challenges in Electronics and Photonics, NGC2007 (2007).

32  S.-Q. Yu, D. Ding, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, Impact of Electronic Density of States on Electroluminescence Refrigeration, Symposium on Nano and Giga Challenges in Electronics and Photonics, NGC2007 (2007).

31  Y.-H. Zhang, S.-Q. Yu, D. Ding, J.-B. Wang, S. R. Johnson, N. A. Rider, Semiconductor Electroluminescence Refrigeration, SPIE Photonics West (2007).

30  S.-Q. Yu, N. Rider, D. Ding, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, Light Emitting Diodes with Extremely High Extraction-Efficiency for Electroluminescence Refrigeration, Conference on Lasers and Electro-Optics, 2007-CLEO/IQEC.

29  S. R. Johnson, D. Ding, S.-Q. Yu, J.-B. Wang, Y.-H. Zhang, Optimal bandgap energy for optical refrigeration in semiconductors, SPIE Photonics West (2007).

28  J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Experimental determination of internal quantum efficiency for semiconductor luminescence refrigeration, SPIE Photonics West (2007).

27  N. Rider, S.-Q. Yu, J.-B. Wang, D. Ding, S. R. Johnson, Y.-H. Zhang, Highly Reflective Non-Alloyed Ohmic Contacts on n-type GaAs, SPIE Photonics West (2007).

26  S.-Q. Yu, N. Rider, J.-B. Wang, D. Ding, S. R. Johnson, Y.-H. Zhang, High extraction efficiency light emitting diodes for electroluminescence refrigeration, SPIE Photonics West (2007).

2006

25  S. R. Johnson, J.-B. Wang, D. Ding, S.-Q. Yu and Y.-H. Zhang, Temperature Dependent Measurements of the Nonradiative Coefficients in MBE Grown GaAs/AlGaAs Heterostructures using Excitation Dependent Photoluminescence, 24^th North American Conference on Molecular Beam Epitaxy (2006).

24  S. R. Johnson, D. Ding, J.-B. Wang, S.-Q. Yu and Y.-H. Zhang, Influence of Bandgap and Quantum Efficiency on Optical Refrigeration, International symposium of compound semiconductor, 2006-ISCS, Vancouver, CA.

23  D. Ding, S. R. Johnson, J.-B. Wang, S.-Q. Yu, and Y.-H. Zhang, Intrinsic Irreversibility in Light Emission Processes in Semiconductors, International symposium of compound semiconductor, 2006-ISCS, Vancouver, CA.

22  S.-Q. Yu, J.-B. Wang, D. Ding, N. Samal, S. R. Johnson, Y.-H. Zhang, Gain-Peak Cavity-Mode Tuning in 1.3 μm GaAsSb VCSELs, International symposium of compound semiconductor, 2006-ISCS, Vancouver, CA.

21  S.-Q. Yu, D. Ding, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, Electroluminescence Refrigeration in Semiconductors, Conference on Lasers and Electro-Optics, 2006-CLEO/IQEC.

20 Y.-H. Zhang, J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Theoretical Limits of Electro-luminescence Refrigeration in Semiconductors, SPIE Photonics West (2006).

19  S.-Q. Yu, D. Ding, R. Gupta, X. Jin, Shane Johnson, J. Gu, Y.-H. Zhang, VCSEL structure embedded in metal heat sink for optimal thermal management, SPIE Photonics West (2006).

18  J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Photoluminescence refrigeration in semiconductors, SPIE Photonics West (2006).

17  S.-Q. Yu, D. Ding, J.-B. Wang, S. R. Johnson, D. Vasileska, Y.-H. Zhang, Electroluminescence refrigeration in semiconductor light emission diodes, SPIE Photonics West (2006).

2005

16  S. R. Johnson, S.-Q. Yu, X. Jin, Y.-H. Zhang, Injection Uniformity in GaAsP/GaAs/GaAsSb Quantum Well Lasers, 23^rd North American Conference on Molecular Beam Epitaxy (2005).

15  S.-Q. Yu, J.-B. Wang, D. Ding, S. R. Johnson, Y.-H. Zhang, Interplay of thermoelectric Cooling and Electroluminescence Refrigeration in LEDs, Proceedings of the 24^th International Conference on Thermoelectrics, ITC 2005 (2005).

14  D. Ding, J.-B. Wang, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Optimal Bandgap Energy for Optical Refrigeration in Semiconductors, SPIE 50^th Annual Meeting/Optics & Photonics (2005).

13  D. Ding, J.-B. Wang, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Thermodynamic Analysis of Optical Refrigeration in Semiconductors, Conference on Lasers and Electro-Optics, 2005-CLEO/IQEC Technical Digest (2005).

12  J.-B. Wang, D. Ding, S.-Q. Yu, S. R. Johnson, Y.-H. Zhang, Electroluminescence Cooling in Semiconductors, Conference on Lasers and Electro-Optics, 2005-CLEO/IQEC Technical Digest (2005).

2004

11  S.-Q. Yu, X. Jin, Y. Cao, D. Ding, J.-B. Wang, S. R. Johnson, Y.-H. Zhang, P. Dowd, M. Adamcyk, S. A. Chaparro, Above Room Temperature CW Edge-Emitting Lasers with GaAsP/GaAs/GaAsSb Active Regions, Optical Society of America, Conference on Lasers and Electro-Optics, 2004-CLEO/IQEC Technical Digest (2004).

2003

10  X. Jin, S.-Q. Yu, Y. Cao, D. Ding, J.-B. Wang, N. Samal, Yu. G. Sadofyev, S. R. Johnson, Y.-H. Zhang, 1.3 µm GaAsSb Resonant-Cavity Light-Emitting Diodes Grown on GaAs Substrate, Proceedings of the IEEE Lasers and Electro-Optics Society 16^th Annual Meeting, 69 (2003).

9    S. R. Johnson, Yu. G. Sadofyev, K. Franzreb, Y. Cao, D. Ding, N. Samal, S. A. Chaparro, J.-B. Wang, X. Jin, S.-Q. Yu, Y.-H. Zhang, Sb-Mediated Growth of Si and Be Doped AlGaAs by Molecular Beam Epitaxy, 21^st North American Conference on Molecular Beam Epitaxy (2003).

8    J.-B. Wang, S. R. Johnson, C. Z. Guo, S. A. Chaparro, J. A. Gupta, Yu. G. Sadofyev, Y. Cao, N. Samal, X. Jin, S.-Q. Yu, D. Ding, Y.-H. Zhang, Determination of GaAs/GaAsSb Heterojunction Conduction Band Offset, Proceedings of the 2003 International Symposium on Compound Semiconductors, IEEE Catalog Number: 03TH8675, 217 (2003).

7    M. Adamcyk, S. A. Chaparro, P. Dowd, S. A. Feld, K. Hilgers, S. R. Johnson, J. Joseph, B. Liang, K. Shiralagi, S.-Q. Yu, Y.-H. Zhang, 1.3 µm GaAsSb/GaAs VCSELs for Telecommunications Applications, SPIE Photonics West (2003).

6    N. Samal, Y. Cao, D. Ding, J.-B. Wang, S.-Q. Yu, X. Jin, S. A. Chaparro, Yu. G. Sadofyev, S. R. Johnson, Y.-H. Zhang, Room Temperature CW Operation of Long Wavelength GaAsSb/GaAs VCSELs Grown on GaAs, SPIE Photonics West (2003).

2002

5    S. R. Johnson, C.-Z. Guo, S. A. Chaparro, Yu. G. Sadofyev, J.-B. Wang, Y. Cao, N. Samal, C. Navarro, X. Jin, S.-Q. Yu, D. Ding, Y.-H. Zhang, Band Alignment Determination of MBE Grown GaAsSb on GaAs with 1300 nm Emission, 12^th International Conference on Molecular Beam Epitaxy, MBE XII (2002).

4    Y.-H. Zhang, S. R. Johnson, C.-Z. Guo, N. Samal, J.-B. Wang, S.-Q. Yu, Y. Cao, D. Ding, S. Chaparro, Yu. G. Sadofyev, X. Jin, C. Navarro, D. J. Smith, Room Temperature CW Operation of 1.3 µm Strain-Compensated GaAsP/GaAs/GaAsSb MQW VCSELs Grown on GaAs, Asia-Pacific Optical and Wireless Communications Conference, APOC-2002 Proceedings (2002).

3    S. R. Johnson, S. A. Chaparro, N. Samal, P. Dowd, S.-Q. Yu, J.-B. Wang, K. Shiralagi, Y.-H. Zhang, Room Temperature Continuous-Wave Operation of 1.3 µm GaAsP/GaAs/GaAsSb VCSELs Grown on GaAs, 28^th European Conference on Optical Communication (2002).

2001

2    S. R. Johnson, S. Wu, Yu. G. Sadofyev, Y. Cao, S. A. Chaparro, J.-B. Wang, N. Samal, S.-Q. Yu, C. Navarro, X. Jin, Z.-B. Chen, D. Ding, N. Newman, Y.-H. Zhang, Nitrogen Plasma Ion and Neutral Energy Spectra and Dilute Nitride Growth, 20^th North American Conference on Molecular Beam Epitaxy (2001).

1   Z.-B. Chen, S. R. Johnson, C. Navarro, S. A. Chaparro, X. Jin, N. Samal, J.-B. Wang, Y. Cao, S.-Q. Yu, Y.-H. Zhang, Strain Compensated GaAsP/GaAsSb/GaAs 1.3 µm Lasers