Yong-Hang Zhang
Professor, School of Electrical, Computer and Energy Engineering
Senior Global Futures Scientist, Global Futures Scientists and Scholars
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ERC 117 Arizona State University TEMPE, AZ 85287-9309
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Mail code: 5706Campus: Tempe
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Long Bio
Yong-Hang Zhang is a Professor of Electrical Engineering and the founding director of the Center for Photonics Innovation at ASU. His primary research is on the growth, fabrication and characterization of novel optoelectronic materials and devices with focus on narrow-gap semiconductors, IR detectors, and solar cells. His recent work focuses on type-II superlattice and IR detectors and heterovalent semiconductor integration (such as II-VI, IV-VI, IV-IV and III-V) for lsaer, detector and solar cells applications. He did his thesis research at the Max Planck Institute for Solid States Research and received his doctoral degree in physics from the University of Stuttgart in 1991. He then worked as an Assistant Research Engineer at UCSB before he joined HRL in 1993. In 1996, he was appointed as an Associate Professor at ASU and became a full professor in 2000. He served as the Associate Dean for Research at the Ira Fulton Schools of Engineering and the Director of ASU Nanofab. He edited 4 books, published 4 book chapters and more than 310 peer-reviewed papers, 18 issued and pending US patents, presented close to 430 invited and contributed talks, and graduated 28 PhD students and supervised over 40 postdocs and visiting scholars. He is a fellow of IEEE and OSA, and the chair of both Advisory Committees for the International Conference on Molecular Beam Epitaxy (MBE) and the International North America MBE Conference.
Education
- Dr. rer. nat. University of Stuttgart, with the research work carried at the Max-Planck Institute for Solid States, Germany 1991. Advisor: Klaus Ploog
Research Interests
Semiconductor optoelectronic devices and materials, including semiconductor lasers, photodetectors, solar cells, and their integration for various applications. Molecular beam epitaxy growth of semiconductor quaantum structures.
Publications
Professor Zhang has edited three books, published three book chapters and more than 300 peer reviewed papers, presented close to 400 invited and contributed talks, 13 issued and pending U.S. patents.
Selected publications
- Book chapter: Y.-H. Zhang, Heterovalent semiconductor structures and their device applications, in Molecular Beam Epitaxy, edited by Hajime ASAHI and Yoshiji HORIKOSHI, John Wiley & Sons, Ltd, March, 2019.
- Y.-H. Zhang and D. J Smith, Heterovalent semiconductor structures and devices grown by molecular beam epitaxy, J. of Vac. Sci. & Technol. A: Vacuum, Surfaces, and Films 39, 030803 (2021).
- J. Ding, C.-Y. Tsai, Z. Ju, and Y.-H. Zhang, Epitaxial lift-off CdTe/MgCdTe double heterostructures for thin-film and flexible solar cells applications, Appl. Phys. Lett. 118, 181101 (2021). (Featured article, Editor’s pick as Scilight)
- Y. Zhou, Y. Miao, S. Ojo, H. Tran, G. Abernathy, J. M Grant, S. Amoah, G. Salamo, W. Du, J. Liu, J. Margetis, J. Tolle, Y.-H. Zhang, G. Sun, R. A. Soref, B. Li, S.-Q. Yu, Electrically injected GeSn lasers on Si operating up to 100 K, Optica 7, 924-928 (2020).
- E. Luna, A. Trampert, J. Lu, T. Aoki, Y.-H. Zhang, M.R. McCartney, D.J. Smith, Strategies for Analyzing Noncommon-Atom Heterovalent Interfaces: The Case of CdTe-on-InSb, Advanced Materials Interfaces, 1901658 (2019).
- M. B. Lassise, P. Wang, B. D. Tracy, G. Chen, D. J. Smith, Y.-H. Zhang, Growth of II-VI/III-V heterovalent quantum structures, J. Vac. Sci. Technol. B 36, 02D110 (2018)
- J. J. Becker, M. Boccard, C. M. Campbell, Y. Zhao, M. Lassise, Z. C. Holman, and Y.-H. Zhang, Loss analysis of monocrystalline CdTe solar cells with 20% active-area efficiency, IEEE J. of Photovoltaics 7, 900 – 905 (2017).
- X.-H. Zhao, S. Liu, C. M. Campbell, Y. Zhao, M. B. Lassise, and Y.-H. Zhang, Ultralow interface recombination velocity (~1 cm/s) at CdTe/MgxCd1-xTe heterointerface, IEEE J.of Photovoltaics 7, 913 – 918 (2017).
- Y. Zhao, M. Boccard, S. Liu, J. Becker, X.-H. Zhao, C. M. Campbell, E. Suarez, M. B. Lassise, Z. Holman, and Y.-H. Zhang, Monocrystalline CdTe Solar Cells with Open-Circuit Voltage Over 1V and Efficiency of 17%, Nature Energy 1, 16067 (2016).
- Z.-Y. He, C. M. Campbell, M. B. Lassise, Z.-Y. Lin, J. J. Becker, Y. Zhao, M. Boccard, Z. Holman, Y.-H. Zhang, CdTe nBn photodetectors with ZnTe barrier layer grown on InSb substrates, Appl. Phys. Lett. 109, 121112 (2016)
- Z.-Y. Lin, S. Liu, E.H. Steenbergen, and Y.-H. Zhang, Influence of carrier localization on minority carrier lifetime in InAs/InAsSb type-II superlattices, Appl. Phys. Lett., 107, 201107 (2015)
- S. Liu, X.-H. Zhao, C. M. Campbell, M. B. Lassise, Y. Zhao, Y.-H. Zhang, Carrier lifetimes and interface recombination velocities in CdTe/MgxCd1-xTe double heterostructures with different Mg compositions grown by molecular beam epitaxy, Appl. Phys. Letts. 107, 041120 (2015)
- A. D. Prins, M. K. Lewis, Z.L. Bushell, S. J. Sweeney, S. Liu, Y.-H. Zhang, Evidence for a defect level above the conduction band edge of InAs/InAsSb type-II superlattices for applications in efficient infrared photodetectors, Appl. Phys. Letts. 106, 171111 (2015)
- W. Yang, J. Becker, S. Liu, Y.-S. Kuo, J.-J. Li, B. Landini, K. Campman, Y.-H. Zhang, Ultra-thin GaAs single-junction solar cells integrated with a reflective back scattering layer, J. Appl. Phys. 115, 203105 (2014)
- M. J. DiNezza, X.-H. Zhao, S. Liu, Y.-H. Zhang, Growth, steady-state, and time-resolved photoluminescence study of CdTe/MgCdTe double heterostructures on InSb substrates using molecular beam epitaxy, Appl. Phys. Lett. 103, 193901 (2013)
- H. S. Kim, O. O. Cellek, Z. Lin, Z.-Y. He, H. Li, S. Liu, and Y.-H. Zhang. Long-wave infrared nBn photodetectors based on InAs/InAsSb type-II superlattices, Appl. Phys. Lett. 101, 161114 (2012)
- D. Ding, S. R. Johnson, S.-Q. Yu, S.-N. Wu, and Y.-H. Zhang, A Semi-Analytical Model for Semiconductor Solar Cells, J. Appl. Phys. 110, 123104 (2011).
- E. H. Steenbergen, B. C. Connelly, G. D. Metcalfe, H. Shen, M. Wraback, D. Lubyshev, Y. Qiu, J. M. Fastenau, A. W. K. Liu, S. Elhamri, O. O. Cellek, and Y.-H. Zhang, Significantly improved minority carrier lifetime observed in a long-wavelength infrared III-V type-II superlattice comprised of InAs/InAsSb, Appl. Phys. Lett. 99, 251110 (2011)
- X. Liu, D. J. Smith, J. Fan, Y.-H. Zhang, H. Cao, Y. P. Chen, J. Leiner, B. J. Kirby, M. Dobrowolska, and J. K. Furdyna, Structural properties of Bi2Te3 and Bi2Se3 topological insulators grown by molecular beam epitaxy on GaAs(100) substrates, Appl. Phys. Lett. 99, 171903 (2011)
- S. H. Lim, J.-J. Li, E. H. Steenbergen, Y.-H. Zhang, Luminescence coupling effects on multi-junction solar cell external quantum efficiency measurement, Progress in Photovoltaics: Research and Applications, 21, 344–350 (2013) (Published online: 30 NOV 2011 | DOI: 10.1002/pip.1215 (2011))
- S.-N. Wu, D. Ding, S. R. Johnson, S.-Q. Yu, and Y.-H. Zhang, Four-junction solar cells using monolithically integrated II-VI and III-V semiconductors, Prog. Photovolt: Res. Appl. 18, 328–333 (2010)
- S. Wang, D. Ding, X. Liu, X.-B. Zhang, D. J. Smith, J. K. Furdyna, and Y.-H. Zhang, MBE growth of II/VI materials on GaSb substrates for photovoltaic applications, J. of Crystal Growth 311, 2116-2119 (2009)
- J.-B. Wang, S. R. Johnson, D. Ding, S.-Q. Yu, and Y.-H. Zhang, Influence of photon recycling on cooling efficiency and cooling power in semiconductor luminescence refrigeration, J. Appl. Phys. 100, 043502 (2006)
- N. Samal, S. R. Johnson, D. Ding, A. K. Samal, Y.-H. Zhang, Novel VCSEL Design with Tailored Spatial Current Injection for High-Power Single-Mode Operation, Appl. Phys. Lett. 87, 161108 (2005)
- J.-B. Wang, S. R. Johnson, S. A. Chaparro, D. Ding, Y. Cao, Yu. G. Sadofyev, Y.-H. Zhang, J.A. Gupta, and C.Z. Guo, Band edge alignment of pseudomorphic GaAs1-ySby on GaAs, Phys. Rev. B70, 195339 (2004)
Courses
2024 Summer
| Course Number | Course Title |
|---|---|
| EEE 590 | Reading and Conference |
| EEE 799 | Dissertation |
| EEE 690 | Reading and Conference |
| EEE 790 | Reading and Conference |
| PHY 799 | Dissertation |
| EEE 795 | Continuing Registration |
| EEE 792 | Research |
| EEE 595 | Continuing Registration |
| PHY 799 | Dissertation |
| PHY 792 | Research |
| PHY 792 | Research |
| EEE 599 | Thesis |
| EEE 592 | Research |
| MSE 792 | Research |
| EEE 592 | Research |
| EEE 595 | Continuing Registration |
| EEE 599 | Thesis |
| EEE 792 | Research |
| EEE 795 | Continuing Registration |
| EEE 799 | Dissertation |
| EEE 590 | Reading and Conference |
| EEE 592 | Research |
| EEE 599 | Thesis |
2024 Spring
| Course Number | Course Title |
|---|---|
| EEE 590 | Reading and Conference |
| PHY 792 | Research |
| PHY 799 | Dissertation |
| EEE 790 | Reading and Conference |
| EEE 592 | Research |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 690 | Reading and Conference |
| EEE 595 | Continuing Registration |
| EEE 492 | Honors Directed Study |
| EEE 599 | Thesis |
| EEE 792 | Research |
| EEE 799 | Dissertation |
| EEE 595 | Continuing Registration |
| MSE 792 | Research |
| MSE 795 | Continuing Registration |
| MSE 799 | Dissertation |
| EEE 792 | Research |
| EEE 592 | Research |
| EEE 595 | Continuing Registration |
| EEE 590 | Reading and Conference |
| EEE 595 | Continuing Registration |
| EEE 795 | Continuing Registration |
| EEE 590 | Reading and Conference |
| EEE 592 | Research |
| EEE 792 | Research |
| EEE 790 | Reading and Conference |
| EEE 790 | Reading and Conference |
| EEE 352 | Properties Electronic Material |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 352 | Properties Electronic Material |
| EEE 499 | Individualized Instruction |
| MSE 792 | Research |
| EEE 499 | Individualized Instruction |
2023 Fall
| Course Number | Course Title |
|---|---|
| EEE 352 | Properties Electronic Material |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 590 | Reading and Conference |
| EEE 595 | Continuing Registration |
| EEE 599 | Thesis |
| EEE 690 | Reading and Conference |
| EEE 790 | Reading and Conference |
| EEE 792 | Research |
| EEE 795 | Continuing Registration |
| EEE 799 | Dissertation |
| PHY 792 | Research |
| PHY 795 | Continuing Registration |
| PHY 799 | Dissertation |
| EEE 592 | Research |
| MSE 792 | Research |
| MSE 795 | Continuing Registration |
| MSE 799 | Dissertation |
| EEE 792 | Research |
| EEE 592 | Research |
| EEE 590 | Reading and Conference |
| EEE 352 | Properties Electronic Material |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 499 | Individualized Instruction |
| PHY 799 | Dissertation |
2023 Summer
| Course Number | Course Title |
|---|---|
| EEE 790 | Reading and Conference |
| EEE 690 | Reading and Conference |
| EEE 590 | Reading and Conference |
| PHY 799 | Dissertation |
| EEE 792 | Research |
| EEE 799 | Dissertation |
| EEE 595 | Continuing Registration |
| PHY 799 | Dissertation |
| PHY 792 | Research |
| PHY 792 | Research |
| EEE 599 | Thesis |
| EEE 592 | Research |
| MSE 792 | Research |
| EEE 592 | Research |
| EEE 595 | Continuing Registration |
| EEE 599 | Thesis |
| EEE 792 | Research |
| EEE 795 | Continuing Registration |
| EEE 799 | Dissertation |
| EEE 590 | Reading and Conference |
| EEE 592 | Research |
| EEE 599 | Thesis |
| EEE 792 | Research |
2023 Spring
| Course Number | Course Title |
|---|---|
| EEE 492 | Honors Directed Study |
| PHY 792 | Research |
| PHY 799 | Dissertation |
| EEE 790 | Reading and Conference |
| EEE 592 | Research |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 690 | Reading and Conference |
| EEE 595 | Continuing Registration |
| EEE 599 | Thesis |
| EEE 792 | Research |
| EEE 799 | Dissertation |
| EEE 595 | Continuing Registration |
| MSE 792 | Research |
| MSE 795 | Continuing Registration |
| MSE 799 | Dissertation |
| EEE 792 | Research |
| EEE 590 | Reading and Conference |
| EEE 795 | Continuing Registration |
| EEE 590 | Reading and Conference |
| EEE 352 | Properties Electronic Material |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 352 | Properties Electronic Material |
| EEE 499 | Individualized Instruction |
| MSE 792 | Research |
2022 Fall
| Course Number | Course Title |
|---|---|
| EEE 352 | Properties Electronic Material |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 590 | Reading and Conference |
| EEE 595 | Continuing Registration |
| EEE 599 | Thesis |
| EEE 690 | Reading and Conference |
| EEE 790 | Reading and Conference |
| EEE 792 | Research |
| EEE 795 | Continuing Registration |
| EEE 799 | Dissertation |
| PHY 792 | Research |
| PHY 799 | Dissertation |
| EEE 592 | Research |
| MSE 792 | Research |
| MSE 795 | Continuing Registration |
| MSE 799 | Dissertation |
| EEE 352 | Properties Electronic Material |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 499 | Individualized Instruction |
| PHY 799 | Dissertation |
2022 Summer
| Course Number | Course Title |
|---|---|
| EEE 790 | Reading and Conference |
| PHY 799 | Dissertation |
| PHY 799 | Dissertation |
| PHY 792 | Research |
| PHY 792 | Research |
| MSE 792 | Research |
| EEE 592 | Research |
| EEE 595 | Continuing Registration |
| EEE 599 | Thesis |
| EEE 792 | Research |
| EEE 795 | Continuing Registration |
| EEE 799 | Dissertation |
| EEE 590 | Reading and Conference |
2022 Spring
| Course Number | Course Title |
|---|---|
| PHY 792 | Research |
| PHY 799 | Dissertation |
| EEE 790 | Reading and Conference |
| EEE 592 | Research |
| EEE 499 | Individualized Instruction |
| EEE 690 | Reading and Conference |
| EEE 595 | Continuing Registration |
| EEE 492 | Honors Directed Study |
| EEE 599 | Thesis |
| EEE 792 | Research |
| EEE 799 | Dissertation |
| EEE 595 | Continuing Registration |
| MSE 792 | Research |
| MSE 795 | Continuing Registration |
| MSE 799 | Dissertation |
| EEE 590 | Reading and Conference |
| EEE 795 | Continuing Registration |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 538 | Optoelectronic Devices |
| MSE 792 | Research |
2021 Fall
| Course Number | Course Title |
|---|---|
| EEE 352 | Properties Electronic Material |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 590 | Reading and Conference |
| EEE 595 | Continuing Registration |
| EEE 599 | Thesis |
| EEE 690 | Reading and Conference |
| EEE 790 | Reading and Conference |
| EEE 792 | Research |
| EEE 795 | Continuing Registration |
| EEE 799 | Dissertation |
| PHY 792 | Research |
| EEE 592 | Research |
| MSE 792 | Research |
| MSE 795 | Continuing Registration |
| MSE 799 | Dissertation |
| EEE 352 | Properties Electronic Material |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 499 | Individualized Instruction |
2021 Summer
| Course Number | Course Title |
|---|---|
| EEE 690 | Reading and Conference |
| EEE 590 | Reading and Conference |
| EEE 790 | Reading and Conference |
| PHY 792 | Research |
| PHY 792 | Research |
| MSE 792 | Research |
| EEE 592 | Research |
| EEE 595 | Continuing Registration |
| EEE 599 | Thesis |
| EEE 792 | Research |
| EEE 795 | Continuing Registration |
| EEE 799 | Dissertation |
| EEE 590 | Reading and Conference |
2021 Spring
| Course Number | Course Title |
|---|---|
| PHY 792 | Research |
| PHY 799 | Dissertation |
| EEE 790 | Reading and Conference |
| EEE 592 | Research |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 690 | Reading and Conference |
| EEE 595 | Continuing Registration |
| EEE 492 | Honors Directed Study |
| EEE 599 | Thesis |
| EEE 792 | Research |
| EEE 799 | Dissertation |
| EEE 595 | Continuing Registration |
| MSE 792 | Research |
| MSE 795 | Continuing Registration |
| MSE 799 | Dissertation |
| EEE 590 | Reading and Conference |
| EEE 795 | Continuing Registration |
| EEE 352 | Properties Electronic Material |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
2020 Fall
| Course Number | Course Title |
|---|---|
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 590 | Reading and Conference |
| EEE 595 | Continuing Registration |
| EEE 599 | Thesis |
| EEE 690 | Reading and Conference |
| EEE 790 | Reading and Conference |
| EEE 792 | Research |
| EEE 795 | Continuing Registration |
| EEE 799 | Dissertation |
| PHY 792 | Research |
| EEE 592 | Research |
| MSE 792 | Research |
| MSE 795 | Continuing Registration |
| MSE 799 | Dissertation |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 499 | Individualized Instruction |
| EEE 537 | Semiconductor Optoelectronics |
2020 Summer
| Course Number | Course Title |
|---|---|
| EEE 690 | Reading and Conference |
| EEE 590 | Reading and Conference |
| EEE 790 | Reading and Conference |
| PHY 792 | Research |
| MSE 792 | Research |
| EEE 592 | Research |
| EEE 595 | Continuing Registration |
| EEE 599 | Thesis |
| EEE 792 | Research |
| EEE 795 | Continuing Registration |
| EEE 799 | Dissertation |
| EEE 590 | Reading and Conference |
2020 Spring
| Course Number | Course Title |
|---|---|
| PHY 792 | Research |
| PHY 799 | Dissertation |
| EEE 790 | Reading and Conference |
| EEE 592 | Research |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 690 | Reading and Conference |
| EEE 595 | Continuing Registration |
| EEE 492 | Honors Directed Study |
| EEE 599 | Thesis |
| EEE 792 | Research |
| EEE 799 | Dissertation |
| EEE 595 | Continuing Registration |
| MSE 792 | Research |
| MSE 795 | Continuing Registration |
| MSE 799 | Dissertation |
| EEE 590 | Reading and Conference |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 538 | Optoelectronic Devices |
2019 Fall
| Course Number | Course Title |
|---|---|
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 590 | Reading and Conference |
| EEE 595 | Continuing Registration |
| EEE 599 | Thesis |
| EEE 690 | Reading and Conference |
| EEE 790 | Reading and Conference |
| EEE 792 | Research |
| EEE 795 | Continuing Registration |
| EEE 799 | Dissertation |
| PHY 792 | Research |
| EEE 592 | Research |
| MSE 792 | Research |
| MSE 795 | Continuing Registration |
| MSE 799 | Dissertation |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 499 | Individualized Instruction |
2019 Summer
| Course Number | Course Title |
|---|---|
| EEE 590 | Reading and Conference |
| EEE 790 | Reading and Conference |
| PHY 792 | Research |
| PHY 792 | Research |
| MSE 792 | Research |
| EEE 592 | Research |
| EEE 595 | Continuing Registration |
| EEE 599 | Thesis |
| EEE 792 | Research |
| EEE 795 | Continuing Registration |
| EEE 799 | Dissertation |
| EEE 590 | Reading and Conference |
2019 Spring
| Course Number | Course Title |
|---|---|
| PHY 792 | Research |
| PHY 799 | Dissertation |
| EEE 790 | Reading and Conference |
| EEE 592 | Research |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
| EEE 690 | Reading and Conference |
| EEE 595 | Continuing Registration |
| EEE 492 | Honors Directed Study |
| EEE 599 | Thesis |
| EEE 792 | Research |
| EEE 799 | Dissertation |
| EEE 595 | Continuing Registration |
| MSE 792 | Research |
| MSE 795 | Continuing Registration |
| MSE 799 | Dissertation |
| EEE 590 | Reading and Conference |
| EEE 795 | Continuing Registration |
| EEE 352 | Properties Electronic Material |
| EEE 492 | Honors Directed Study |
| EEE 493 | Honors Thesis |
| EEE 499 | Individualized Instruction |
Graduate Faculties / Mentoring History
Total number of grad. students advised : over 30 ; total postdoctoral scholars sponsored: over 40.
Work History
- 2005-present: Founding Director, Center for Photonics Innovation, ASU
- 2000-present: Affiliated Professors in Physics and Materials Engineering, ASU
- 1996-present: Associate (96-00) and Professor (00-pesent), School of Electrical, Computer and Energy Engineering, ASU
- 2016-2019: Director, ASU NanoFab, ASU
- 2014-2016:Associate Dean for Research, School of Electrical, Computer and Energy Engineering
- 2012-2014: Fulton Entrepreneurial Professor, Ira A. Fulton Schools of Engineering, ASU
- 1995-1996: Research Staff Member, Hughes Research Laboratories
- 1993-1995: Postdoctoral Research Staff Member, Hughes Research Laboratories
- 1991-1993: Assistant Research Engineer, NSF QUEST Center, University of California-Santa Barbara
Service
- IEEE and OSA Fellow
- Chair, the Advisory Board of the International Conference on MBE
- Chair, the Advisory Committee of the International North America MBE Conference
- Co-General Chair of the 14th Int. Conf. on Mid-IR Optoelectronics: Materials and Devices, 2018
- General chair of the 18th Int. MBE Conference, 2014