Tuesday, May 28, 2013

1305.5883 (K. Sivalertporn et al.)

Strong and weak light-matter coupling in microcavity-embedded double
quantum wells
   [PDF]

K. Sivalertporn, E. A. Muljarov
We demonstrate an efficient switching between strong and weak exciton-photon coupling regimes in microcavity-embedded asymmetric double quantum wells, controlled by an applied electric field. We show that a fine tuning of the electric field leads to drastic changes in the polariton properties, with the polariton ground state being red-shifted by a few meV and having acquired prominent features of a spatially indirect dipolar exciton. We study the properties of dipolar exciton polaritons, called dipolaritons, on a microscopic level and show that, unlike recent findings, they cannot be dark polaritons but are rather mixed states with comparable contribution of the cavity photon, bright direct, and dark indirect exciton modes.
View original: http://arxiv.org/abs/1305.5883

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