TIME RESOLVED MEASUREMENTS OF CROSS-WELL TRANSPORT IN A MULTIPLE QUANTUM-WELL P-I-N MODULATOR AT HIGH PHOTOGENERATED CARRIER DENSITIES

A MILLER, C B PARK, P LIKAMWA

Research output: Contribution to journalArticle

Abstract

Carrier sweep-out rates from GaAs/AlGaAs multiple quantum wells have been measured as a function of excitation level on picosecond time scales at different values of applied electric field. A minimum rate of approximately 20 ps was observed under resonant tunneling conditions at low generated carrier densities. At higher excitation levels, the effects of space charge build-up were found to significantly alter the transient nonlinear optical response due to changes in the time constant associated with vertical carrier transport.

Original languageEnglish
Pages (from-to)97-99
Number of pages3
JournalApplied Physics Letters
Volume60
Issue number1
Publication statusPublished - 6 Jan 1992

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