Polaritonic Stop-Band Transparency via Exciton-Biexciton Coupling in CuCl - Archive ouverte HAL Access content directly
Journal Articles Physical Review Letters Year : 2003

Polaritonic Stop-Band Transparency via Exciton-Biexciton Coupling in CuCl

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Abstract

Radiation is almost completely reflected within the exciton-polariton stop band of a semiconductor, as in the typical case of CuCl. We predict, however, that a coherently driven exciton-biexciton transition allows for the propagation of a probe light beam within the stop band. The phenomenon is reminiscent of electromagnetically induced transparency effects occurring in three-level atomic systems, except that it here involves delocalized electronic excitations in a crystalline structure via a frequency and wave-vector selective polaritonic mechanism. A well-developed transparency, favored by the narrow linewidth of the biexciton, is established within the stop band where a probe pulse may propagate with significant delays. The transparency window can be controlled via the pump beam detuning and intensity.

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hal-00463647 , version 1 (13-03-2010)

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S. Chesi, M. Artoni, G. C. La Rocca, F. Bassani, André Mysyrowicz. Polaritonic Stop-Band Transparency via Exciton-Biexciton Coupling in CuCl. Physical Review Letters, 2003, 91 (5), pp.057402. ⟨10.1103/PhysRevLett.91.057402⟩. ⟨hal-00463647⟩
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