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Phase Dependence of the Inversionless Gain in a Λ System with Near-Degenerate Levels |
| WU Jin-Hui;ZHANG Hui-Fang;GAO Jin-Yue |
| College of Physics, Jilin University, Changchun 130023 |
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| Cite this article: |
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WU Jin-Hui, ZHANG Hui-Fang, GAO Jin-Yue 2002 Chin. Phys. Lett. 19 1103-1105 |
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Abstract Due to interaction with the vacuum of the radiation field, near-degenerate lower levels in a Λ system have an additional coherence term, the spontaneously generated coherence (SGC) term. For such a system, we investigate the effect of the relative phase between two coherent fields on the inversionless gain in the presence of SGC. We find that the inversionless gain, which stems from both spontaneously generated coherence and dynamically induced coherence, can be modulated by the relative phase.
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| Keywords:
42.50.Gy
42.50.Hz
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Published: 01 August 2002
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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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