Role of population transfer under strong probe conditions in electromagnetically induced transparency

Details Role of population transfer under strong probe conditions in electromagnetically induced transparency Role of population transfer under strong probe conditions in electromagnetically induced transparency

2010-08-19

arxiv.org/abs/1008.3227v1

Physics

Optics

4 pages, 4 figure, accepted in Optics Communications

Scientific paper

We analyze theoretically the phenomenon of electromagnetically induced transparency (EIT) under conditions where the probe laser is not in the usual weak limit. We consider the effects in both three-level and four-level systems, which are either closed or open (due to losses to an external metastable level). We find that the EIT dip almost disappears in a closed three-level system but survives in an open system. In four-level systems, there is a narrow enhanced-absorption peak (EITA) at line center, which has applications as an optical clock. The peak converts to an EIT dip in a closed system, but again survives in an open system.

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