Spectral properties of a ■-configuration atom driven by a pair of bichromatic fields  

作　　者：金康 谢小涛 姜振益 

机构地区：[1]Department of Physics, Northwest University [2]National photoelectric technology and Functional Materials & Application of Science and Technology International Cooperation Base [3]National Key Laboratory of Photoelectric Technology and Functional Materials (Culture Base) [4]Institute of Modern Physics, Northwest University

出　　处：《Chinese Physics B》2013年第1期249-256,共8页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos. 61008016, 10647008, and 50971099);the Natural Science Basis Research Plan in Shaanxi Province of China (Grant No. 2010JQ1002);the Education Department of Shaanxi Province, China (Grant Nos. 09JK752 and 11JK0550);the Doctoral Program Foundation of Institutions of Higher Education of China (Grant No. 20106101120020)

摘　　要：The absorption spectrum and the incoherent fluorescence spectrum of the lower transition in an E-configuration threelevel atomic system driven by a pair of bichromatic fields is investigated. The transmission of the absorption profile from a multipeaked feature to a single-peak feature is identified. Adjusting the relative phase between the two driving fields, the splitting effects of the spectral peaks occur both in the fluorescence and the absorption spectra. Furthermore, phase modulating can dramatically lead to a great suppression of the amplitudes ofthe whole absorption spectrum. Physically, this effect is attributed to the phase-sensitive nature of the populations and coherence between the atomic states of the system.The absorption spectrum and the incoherent fluorescence spectrum of the lower transition in an E-configuration threelevel atomic system driven by a pair of bichromatic fields is investigated. The transmission of the absorption profile from a multipeaked feature to a single-peak feature is identified. Adjusting the relative phase between the two driving fields, the splitting effects of the spectral peaks occur both in the fluorescence and the absorption spectra. Furthermore, phase modulating can dramatically lead to a great suppression of the amplitudes ofthe whole absorption spectrum. Physically, this effect is attributed to the phase-sensitive nature of the populations and coherence between the atomic states of the system.

关 键 词：bichromatic field phase modulating degradation of absorption splitting effect 

分 类 号：O562.3[理学—原子与分子物理]