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EnglishRadiation 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.
| Titolo: | Polaritonic stop-band transparency via exciton-biexciton coupling in CuCl | |
| Autori: | ||
| Data di pubblicazione: | 2003 | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevLett.91.057402 | |
| Handle: | http://hdl.handle.net/11384/5453 | |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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