Short Bio
1991: Dr. rer. nat. in Physics, Max-Planck Institute for Solid States and University of Stuttgart, Germany.
Academic Experience:
10/2005-present: Director, Center for Nanophotonics, Arizona Institute of Nanoelectronics, ASU.
5/2004-present: Director, Center for Semiconductor Optical Refrigeration, ASU.
8/2006-present: Affiliated Professor, Department of Physics, ASU.
8/2006-present: Affiliated Professor, School of Materials, ASU.
2000-present: Professor, Electrical Engineering Department, ASU.
1996-2000: Associate Professor, Electrical Engineering Department, ASU.
1991-1993: Postdoctoral Assistant Research Engineer, NSF QUEST Center, University of California at Santa Barbara.
Industrial Experience:
5/2001-8/2003: On leave from ASU and served as the Chairman of the Board, CEO, and the President of Lytek Corporation
1993-1995: Postdoctoral Research Fellow, Hughes Research Laboratories
1995-1996: Research Staff Member, Hughes Research Laboratories
Consultant to Applied Materials, Lytek, Fermionics, Tokyo Electronics Phoenix Research Laboratories, etc.
Selected Professional Activities and Awards:
• IEEE Senior Member
• Award for Innovation & Excellence in Laser Technology & Applications, Hughes Electronics Company, 1994.

• Listed in Who's Who in Science and Engineering, Who's Who in the World, Who's Who in North America etc. since 1993.

More than 130 papers in refereed journals and conference proceedings, 1 invited book chapter, 2 edited conference proceedings, 4 issued US patents, more than 130 invited and contributed conference presentations. (Selected publications:)
1. 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).
2. 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).
3. 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).
4. P. Dowd, S.R. Johnson, S.A. Feld, M. Adamcyk, S.A. Chaparro, J. Joseph, K. Hilgers, M.P. Horning, K. Shiralagi, Y.-H. Zhang, Long wavelength GaAsP/GaAs/GaAsSb VCSELs on GaAs substrates for communications applications, Electron. Lett. 39, 987 (2003).
5. R. Leon, G. M. Swift, B. Magness, W.A. Taylor, Y.S. Tang, K.L. Wang, P. Dowd, and Y.-H. Zhang, Changes in luminescence emission induced by proton irradiation: InGaAs/GaAs quantum wells and quantum dots, Appl. Phys. Lett. 76(15), 2075 (2000).
6. P. Dowd, W. Braun, David J. Smith, C.M. Ryu, C.-Z. Guo, S.L. Chen, U. Koelle, S.R. Johnson, and Y.-H. Zhang, Long Wavelength (1.3 µm and 1.5 µm) Photoluminescence from InGaAs/GaPAsSb Quantum Wells Grown on GaAs, Appl. Phys. Lett. 75(9), 1267 (1999).
Selected Conference Activities
• Program Committee Co-Chair, International Symposium on Compound Semiconductors, 2006
• Advisory Committee Member of the International North America Molecular Beam Epitaxy Conference 2000-present.
• Program Committee Member for LEOS Annual Meeting, 2003.

• Program Committee Member for the International MBE Conf., 2002.

• Program Committee Member for CLEO, Laser Applications and Optical Instrumentation Systems, 2000-2003.

• Chairman of the International North America Molecular Beam Epitaxy Conference, 2000.