S. GUPTA, J. PAMULAPATI, J. CHWALEK, P. K. BHATTACHARYA, J. F. WHITAKER, and G. MOUROU, "Subpicosecond photoconductors using low temperature MBE growth of InP and GaAs based materials,"
in International Quantum Electronics Conference, A. Owyoung, C. Shank, S. Chu, and E. Ippen, eds.,
Vol. 8 of OSA Technical Digest
(Optical Society of America, 1990), paper QWB5.