TITLE

Ultrafast ac Stark effect switching of the active photonic band gap from Bragg-periodic semiconductor quantum wells

AUTHOR(S)
Prineas, J. P.; Zhou, J. Y.; Kuhl, J.; Gibbs, H. M.; Khitrova, G.; Koch, S. W.; Knorr, A.
PUB. DATE
December 2002
SOURCE
Applied Physics Letters;12/2/2002, Vol. 81 Issue 23, p4332
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The ultrafast suppression and recovery of an active photonic band-gap structure constructed from the periodic complex susceptibility of quantum well excitons is demonstrated. For resonant pumping, the corresponding superradiant mode is slaved by the external field, and the structure forms a mirror that can be switched on and off at a bandwidth limited only by the width of the pump-pulse and the photonic band gap. Absorption and creation of free carriers is suppressed by the accelerated decay of the superradiant mode of the light-coupled quantum wells.
ACCESSION #
8563608

 

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