Accession Number : ADP007866

Title :   Dynamics of Excitons in Quantum Wells,

Corporate Author : IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS NY

Personal Author(s) : Zachau, M. ; Kash, J. A. ; Masselink, W. T.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : We measure the time dependence of the excitonic photoluminescence (PL) in quantum wells (QWs) with well width Lz ranging from 25A to 50A. The samples are AI0.2Ga0.8As/GaAs multiple QWs with 30 periods with decoupled wells and were grown by molecular beam epitaxy (MBE). QWs grown with and without growth interruption at the interfaces are investigated. The excitation is provided by 5 psec pulses from a synchronously pumped tunable dye laser. The PL spectrum is detected by an imaging (i.e. multichannel) photomultiplier with a spectral resolution of 0.5 meV and time resolution (FWHM) of 120 psec.

Descriptors :   *PHOTOLUMINESCENCE, *EXCITONS, DYE LASERS, EXCITATION, INTERFACES, INTERRUPTION, MOLECULAR BEAMS, MULTICHANNEL, PULSES, RESOLUTION, TIME DEPENDENCE, WIDTH, EPITAXIAL GROWTH.

Subject Categories : Electrooptical and Optoelectronic Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE