Transient responses of transparency in a far-off resonant atomic system

doi:10.1088/1674-1056/23/5/054204

中国物理B ›› 2014, Vol. 23 ›› Issue (5): 54204-054204.doi: 10.1088/1674-1056/23/5/054204

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Transient responses of transparency in a far-off resonant atomic system

胡正峰^a, 杜春光^b, 邓见辽^a, 王育竹^a

a The Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
b Department of Physics, Tsinghua University, Beijing 100084, China

收稿日期:2013-06-26 修回日期:2013-09-29 出版日期:2014-05-15 发布日期:2014-05-15
基金资助:
Project supported by the Knowledge Innovation Program of the Chinese Academy of Sciences and the National Basic Research Program of China.

Transient responses of transparency in a far-off resonant atomic system

Hu Zheng-Feng (胡正峰)^a, Du Chun-Guang (杜春光)^b, Deng Jian-Liao (邓见辽)^a, Wang Yu-Zhu (王育竹)^a

a The Key Laboratory of Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
b Department of Physics, Tsinghua University, Beijing 100084, China

Received:2013-06-26 Revised:2013-09-29 Online:2014-05-15 Published:2014-05-15
Contact: Hu Zheng-Feng E-mail:zfhu@siom.ac.cn
About author:42.50.Gy; 42.50.Hz; 42.65.-k
Supported by:
Project supported by the Knowledge Innovation Program of the Chinese Academy of Sciences and the National Basic Research Program of China.

摘要/Abstract

摘要： Transient coherent oscillations in a closed Λ system under far-off resonant Raman fields were investigated theoretically. It has been found that the coherent superposition of the ground states can be formed due to the absorption even for initial maximal mixed ground states. The absorption oscillates with a period depending on the two-photon detuning when the system is initially in a transparent state and the two-photon Raman detuning is suddenly changed. The amplitude of the absorption decays with the decay rate of the ground states, which is different from the case when the lasers are applied resonantly. These transient coherent oscillations can be used to measure the relaxation rate of the ground states.

关键词: laser atom interaction, coherent population trapping, transient coherent oscillation, three-level system

Abstract: Transient coherent oscillations in a closed Λ system under far-off resonant Raman fields were investigated theoretically. It has been found that the coherent superposition of the ground states can be formed due to the absorption even for initial maximal mixed ground states. The absorption oscillates with a period depending on the two-photon detuning when the system is initially in a transparent state and the two-photon Raman detuning is suddenly changed. The amplitude of the absorption decays with the decay rate of the ground states, which is different from the case when the lasers are applied resonantly. These transient coherent oscillations can be used to measure the relaxation rate of the ground states.

Key words: laser atom interaction, coherent population trapping, transient coherent oscillation, three-level system

中图分类号: (Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)

42.50.Gy

42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift) 42.65.-k (Nonlinear optics)

胡正峰, 杜春光, 邓见辽, 王育竹. Transient responses of transparency in a far-off resonant atomic system[J]. 中国物理B, 2014, 23(5): 54204-054204.

Hu Zheng-Feng (胡正峰), Du Chun-Guang (杜春光), Deng Jian-Liao (邓见辽), Wang Yu-Zhu (王育竹). Transient responses of transparency in a far-off resonant atomic system[J]. Chin. Phys. B, 2014, 23(5): 54204-054204.

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Transient responses of transparency in a far-off resonant atomic system

Transient responses of transparency in a far-off resonant atomic system

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