Modulation of atomic exit and injection rates on the phase-dependent gain without inversion in a Doppler broadened open four-level system

doi:10.1088/1674-1056/21/6/064208

中国物理B ›› 2012, Vol. 21 ›› Issue (6): 64208-064208.doi: 10.1088/1674-1056/21/6/064208

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

Modulation of atomic exit and injection rates on the phase-dependent gain without inversion in a Doppler broadened open four-level system

刘中波^a, 贾克宁^a, 梁颖^a, 仝殿民^b, 樊锡君^a

a. College of Physics and Electronics, Shandong Normal University, Jinan 250014, China;
b. School of Physics, Shandong University, Jinan 250100, China

收稿日期:2011-07-12 修回日期:2011-10-14 出版日期:2012-05-01 发布日期:2012-05-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11175105).

Modulation of atomic exit and injection rates on the phase-dependent gain without inversion in a Doppler broadened open four-level system

Liu Zhong-Bo(刘中波)^a), Jia Ke-Ning (贾克宁)^a), Liang Ying(梁颖)^a), Tong Dian-Min(仝殿民)^b), and Fan Xi-Jun(樊锡君)^a)†

a. College of Physics and Electronics, Shandong Normal University, Jinan 250014, China;
b. School of Physics, Shandong University, Jinan 250100, China

Received:2011-07-12 Revised:2011-10-14 Online:2012-05-01 Published:2012-05-01
Contact: Fan Xi-Jun E-mail:xjfan108@yahoo.com.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11175105).

摘要/Abstract

摘要： It is shown that in a Doppler broadened open N-type four-level atomic system with spontaneously generated coherence (SGC), the gain without inversion (GWI) is very sensitive to the variation of the relative phase between the probe field and the driving field; the atomic exit rate (R₀ ) and the ratio (S) of the atomic injection rates have a considerable modulation effect on the phase-dependent GWI. GWI first increases and then decreases with R₀ increasing; in a certain value range of S, GWI increases monotonically with S increasing; by adjusting the values of R₀ and S, in an open system a much larger GWI can be obtained than in the corresponding closed system [2011 Phys. Rev. A 83 043805]. The modulation effects of R₀ and S on the phase-dependent GWI in the case with the counter-propagating probe and driving fields are stronger than those in the co-propagating case, GWI in the co-propagating case is much larger than that in the counter-propagating case.

关键词: open N-type four-level system, spontaneously generated coherence, relative phase, Doppler broadening, gain without inversion

Abstract: It is shown that in a Doppler broadened open N-type four-level atomic system with spontaneously generated coherence (SGC), the gain without inversion (GWI) is very sensitive to the variation of the relative phase between the probe field and the driving field; the atomic exit rate (R₀ ) and the ratio (S) of the atomic injection rates have a considerable modulation effect on the phase-dependent GWI. GWI first increases and then decreases with R₀ increasing; in a certain value range of S, GWI increases monotonically with S increasing; by adjusting the values of R₀ and S, in an open system a much larger GWI can be obtained than in the corresponding closed system [2011 Phys. Rev. A 83 043805]. The modulation effects of R₀ and S on the phase-dependent GWI in the case with the counter-propagating probe and driving fields are stronger than those in the co-propagating case, GWI in the co-propagating case is much larger than that in the counter-propagating case.

Key words: open N-type four-level system, spontaneously generated coherence, relative phase, Doppler broadening, gain without inversion

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.Nn (Quantum optical phenomena in absorbing, amplifying, dispersive and conducting media; cooperative phenomena in quantum optical systems)

刘中波, 贾克宁, 梁颖, 仝殿民, 樊锡君. Modulation of atomic exit and injection rates on the phase-dependent gain without inversion in a Doppler broadened open four-level system[J]. 中国物理B, 2012, 21(6): 64208-064208.

Liu Zhong-Bo(刘中波), Jia Ke-Ning (贾克宁), Liang Ying(梁颖), Tong Dian-Min(仝殿民), and Fan Xi-Jun(樊锡君) . Modulation of atomic exit and injection rates on the phase-dependent gain without inversion in a Doppler broadened open four-level system[J]. Chin. Phys. B, 2012, 21(6): 64208-064208.

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Modulation of atomic exit and injection rates on the phase-dependent gain without inversion in a Doppler broadened open four-level system

Modulation of atomic exit and injection rates on the phase-dependent gain without inversion in a Doppler broadened open four-level system

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