Center for Laser Science and Engineering, University of Iowa, Iowa City, ... George C. Valley .... (circles), 1.26 mJ/cm 2 (open squares), and 0.50 mJ/cm 2 (tri-.
June 1, 1991 / Vol. 16, No. 11 / OPTICS LETTERS
799
Photorefractive nonlinearities caused by the Dember space-charge field in undoped CdTe W. Andreas Schroeder, Thomas S. Stark, Thomas F. Boggess, and Arthur L. Smirl Center for Laser Science and Engineering, University of Iowa, Iowa City, Iowa 52242
George C. Valley Hughes Research Laboratories, 3011 Malibu Canyon Road, Malibu, California 90265
Received January 11, 1991
The photorefractive nonlinearity associated with the Dember space-charge field between electrons and holes produced by two-photon absorption is unambiguously isolated and studied in undoped CdTe by using a nondegenerate, forward-probing, polarization-sensitive, transient-grating technique with a temporal resolution of
