Tunable ultranarrow linewidth of a cavity induced by interacting dark resonances |
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| Authors: | Yandong Peng Luling Jin |
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| Affiliation: | 1. State Key Laboratory of High Field Laser Physics , Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences , Shanghai 201800, China;2. Graduate University of Chinese Academy of Sciences , Beijing 100049, China |
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| Abstract: | A scheme for obtaining 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 detuning of the control field. |
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| Keywords: | electromagnetically induced transparency double-dark resonance optical cavity absorption dispersion |
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