Tunable ultranarrow linewidth of cavity induced by interacting dark resonances

Details Tunable ultranarrow linewidth of cavity induced by interacting dark resonances Tunable ultranarrow linewidth of cavity induced by interacting dark resonances

2009-06-17

arxiv.org/abs/0906.3190v1

Physics

Quantum Physics

4 pages, 5 figures

Scientific paper

A scheme for getting a tunable ultranarrow linewidth of a cavity due to an embedded four-level atomic medium with double-dark resonances is proposed. It is shown that the steep dispersion induced by double-dark resonances in the transparency window leads to the ultranarrow transmission peak. Compared with the case of a single-dark-resonance system, the linewidth can be narrowed even by one order under proper conditions. Furthermore, the position of the ultranarrow peak can be engineered by varying the intensity and detuning of the control field.

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