中国物理B ›› 2014, Vol. 23 ›› Issue (4): 44205-044205.doi: 10.1088/1674-1056/23/4/044205

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

Phase control of light amplification in steady and transient processes in an inverted-Y atomic system with spontaneously generated coherence

田思聪a, 佟存柱a, 万仁刚c, 宁永强a, 秦丽a, 刘云a, 王立军a, 张航a, 王增斌d, 高锦岳b   

  1. a State Key Laboratory of Luminescence and Application, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;
    b State Key Laboratory of Coherent Light and Atomic and Molecular Spectroscopy of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China;
    c State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China;
    d Quantum Engineering Center, Beijng Institute of Control Devices, Beijing 100854, China
  • 收稿日期:2013-08-05 修回日期:2013-09-16 出版日期:2014-04-15 发布日期:2014-04-15

Phase control of light amplification in steady and transient processes in an inverted-Y atomic system with spontaneously generated coherence

Tian Si-Cong (田思聪)a, Tong Cun-Zhu (佟存柱)a, Wan Ren-Gang (万仁刚)c, Ning Yong-Qiang (宁永强)a, Qin Li (秦丽)a, Liu Yun (刘云)a, Wang Li-Jun (王立军)a, Zhang Hang (张航)a, Wang Zeng-Bin (王增斌)d, Gao Jin-Yue (高锦岳)b   

  1. a State Key Laboratory of Luminescence and Application, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China;
    b State Key Laboratory of Coherent Light and Atomic and Molecular Spectroscopy of Ministry of Education, College of Physics, Jilin University, Changchun 130012, China;
    c State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China;
    d Quantum Engineering Center, Beijng Institute of Control Devices, Beijing 100854, China
  • Received:2013-08-05 Revised:2013-09-16 Online:2014-04-15 Published:2014-04-15
  • Contact: Gao Jin-Yue E-mail:jygao@mail.jlu.edu.cn
  • About author:42.50.Gy; 42.50.Hz; 78.67.De

摘要: We investigate the effects of spontaneously generated coherence (SGC) on both the steady and transient gain properties in a four-level inverted-Y-type atomic system in the presence of a weak probe, two strong coherent fields, and an incoherent pump. For the steady process, we find that the inversionless gain mainly origins from SGC. In particular, we can modulate the inversionless gain by changing the relative phase between the two fields. Moreover, the amplitude of the gain peak can be enhanced and the additional gain peak can appear by changing the detuning of the coupling field. As for the transient process, the transient gain properties can also be dramatically affected by the SGC. Compared to the case without SGC, the transient gain can be greatly enhanced with completely eliminated transient absorption by choosing the proper relative phase between the two fields. And the inverted-Y-type system with SGC can be simulated in both atomic and semiconductor quantum well systems avoiding the conditions of SGC.

关键词: spontaneously generated coherence, gain without inversion, transient evolution, relative phase

Abstract: We investigate the effects of spontaneously generated coherence (SGC) on both the steady and transient gain properties in a four-level inverted-Y-type atomic system in the presence of a weak probe, two strong coherent fields, and an incoherent pump. For the steady process, we find that the inversionless gain mainly origins from SGC. In particular, we can modulate the inversionless gain by changing the relative phase between the two fields. Moreover, the amplitude of the gain peak can be enhanced and the additional gain peak can appear by changing the detuning of the coupling field. As for the transient process, the transient gain properties can also be dramatically affected by the SGC. Compared to the case without SGC, the transient gain can be greatly enhanced with completely eliminated transient absorption by choosing the proper relative phase between the two fields. And the inverted-Y-type system with SGC can be simulated in both atomic and semiconductor quantum well systems avoiding the conditions of SGC.

Key words: spontaneously generated coherence, gain without inversion, transient evolution, relative phase

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) 78.67.De (Quantum wells)