Accession Number : ADP007868

Title :   Optical Nonlinearities of Type-II Quantum Wells,

Corporate Author : SANDIA NATIONAL LABS ALBUQUERQUE NM

Personal Author(s) : Olbright, G. R. ; Fu, W. S. ; Owyoung, A. ; Klem, J. ; Binder, R.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : In this paper we describe a detailed study of the complete time evolution of the optical nonlinearities of type-11 GaAs/AlAs quantum wells using nanosecond and femtosecond pump/probe spectroscopy. We explain these nonlinearities by solving the generalized Wannier equation for the case of a type-II quantum-well structure. In contrast to the usual type-I quantum-wells, we observe different shifts and saturations of light- and heavy-hole excitons as well as the absence of gain. The dominant effects are a blue shift and saturation of the heavy-hole (HH) exciton.

Descriptors :   *NONLINEAR OPTICS, *QUANTUM ELECTRONICS, *SEMICONDUCTOR DEVICES, BLUE(COLOR), CONTRAST, EQUATIONS, EXCITONS, GAIN, LIGHT, PROBES, SATURATION, SPECTROSCOPY, STRUCTURES, FREQUENCY SHIFT, GALLIUM ARSENIDES, OPTICAL PUMPING.

Subject Categories : Optics
      Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE