Journal
SUPERLATTICES AND MICROSTRUCTURES
Volume 41, Issue 5-6, Pages 308-312Publisher
ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD
DOI: 10.1016/j.spmi.2007.03.005
Keywords
intersubband transitions; microcavity; cavity polaritons
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We report the external control of the intersubband polariton coupling by manipulating the carrier density in quantum wells resonantly coupled to a GaAs/AlGaAs microcavity. The electrons in the wells were tuned by means of a depletion gate Was or by utilizing charge transfer between the energetically aligned ground subbands of asymmetric tunnel-coupled quantum wells. We propose the use of tunnel-assisted control of the polariton ground state in an asymmetrically coupled quantum well for implementing ultrafast modulation of intersubband polaritons. (c) 2007 Elsevier Ltd. All rights reserved.
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