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Sideband-Induced Two-Photon Transparency |
| CHENG Guang-Ling;HU Xiang-Ming |
| Department of Physics, Huazhong Normal University, Wuhan 430079 |
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| Cite this article: |
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CHENG Guang-Ling, HU Xiang-Ming 2006 Chin. Phys. Lett. 23 2084-2087 |
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Abstract We show that it is possible to use a single sideband to induce two-photon transparency in a three-level cascade medium. The medium simultaneously absorbs two photons as a one-step process when the middle level is far off one-photon resonance. A resonant sideband coupling on the upper transition and the two-photon one-step process drive the medium into a trapped state, and the dominant component is the ground state. Thus almost all population is trapped in the ground state and the two-photon absorption is dramatically suppressed. We present a numerical calculation for arbitrary values of the atomic and field parameters and also provide an analytic description for the required conditions.
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| Keywords:
42.50.Gy
42.50.Hz
32.80.Wr
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Published: 01 August 2006
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| PACS: |
42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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42.50.Hz
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(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
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32.80.Wr
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(Other multiphoton processes)
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