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Photo of Grein, Christoph

Christoph Grein, PhD




Building & Room:

2358 SES


845 West Taylor St.

Office Phone:

(312) 996-6753



Professor Grein's research concentrates on the electronic and structural properties of narrow gap semiconductors with optoelectronic applications. He has worked extensively at computing nonradiative recombination and generation rates in superlattice-based infrared detectors and lasers and employs band structure engineering to optimize material properties.

Selected Publications

  • “Material optimization for extended short wavelength and mid-wavelength infrared avalanche photodiodes”, S. Tempel, M. Winslow, S. H. Kodati, S. Lee, T. J. Ronningen, J. C. Campbell, S. Krishna, C. Grein, SPIE Proceedings 12430, 12430-41 (2023)
  • “High Gain, Low Noise, Room Temperature 1550 nm GaAsSb/AlGaAsSb Avalanche Photodiodes”, S. Lee, X. Jin, H. Jung, H. Lewis, Y. Liu, B. Guo, S. H. Kodati,  M. Schwartz, C. H. Grein, T. J. Ronningen, J. P. R. David, Joe. C. Campbell, and S. Krishna, Optica 10, 147 (2023)
  • “Simulation of impact ionization coefficients in InAlAs/InAsSb type-II superlattice material systems” M. Winslow, T. J. Ronningen, S. Lee, S. H. Kodati, D. R. Fink, A. H. Jones, J.C. Campbell, S. Krishna, and C. H. Grein, Journal of Electronic Materials 5, 7293 (2021)
  • “Engineering of impact ionization characteristics in In0.53Ga0.47As/Al0.48In0.52As superlattice avalanche photodiodes on InP substrate” S. Lee, C. H. Grein, A. H. Jones, D. R. Fink, S. H. Kodati, M. M. Hayat, M. Winslow, T. J. Ronningen, J. C. Campbell, and S. Krishna, Scientific Reports 10, 2045 (2020)
  • “A comparison of indium arsenide antimonide and mercury cadmium telluride as long wavelength infrared detector materials”, A.J. Ciani, C.H. Grein, W.L. Sarney and S.P. Svensson, Journal of Applied Physics 128, 075704 (2020)
  • “Investigation of carrier localization in InAs/AlSb type-II superlattice material system”, S. Lee, H. J. Jo,  S. Mathews, J. A. Simon, T. J. Ronningen, S. H. Kodati, D. R. Fink, J. S. Kim, M. Winslow, C. H. Grein, A. H. Jones,  J. C. Campbell, and S. Krishna, Appl. Phys. Lett. 115, 211601 (2019).


BS, Physics (1984), University of New Brunswick

MS, Physics (1986), Princeton University

PhD, Physics (1989), Princeton University