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Coherent all-optical polarization switching based on exciton–exciton interactions in quantum wells

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5 Author(s)
Gansen, Eric J. ; Laboratory for Photonics and Quantum Electronics, 138 IATL University of Iowa, Iowa City, Iowa 52242 ; Jarasiunas, K. ; Hawkins, Scot A. ; Stevens, Martin J.
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A coherent all-optical nonlinear polarization switch based on exciton–exciton correlations is demonstrated in a multiple-quantum-well semiconductor structure. A contrast ratio of 8:1 and a relaxation time of less than a picosecond are reported at 80 K using only ten wells. The results are compared to a simple phenomenological model to demonstrate that many-body effects are solely responsible for the switching action and that the turn-on and turn-off times are determined by the dephasing time. © 2001 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:90 ,  Issue: 3 )

Date of Publication:

Aug 2001

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