Spontaneous emission fromΛ-type three-level atom driven by bichromatic field in anisotropic double-band photonic crystals  

作　　者：凌凯 姜丽 万仁刚 姚治海 Kai Ling;Li Jiang;Ren-Gang Wan;Zhi-Hai Yao(Changchun University of Science and Technology,Changchun 130000,China;School of Physics and Information Technology,Shaanxi Normal University,Xi’an 710062,China)

机构地区：[1]Changchun University of Science and Technology,Changchun 130000,China [2]School of Physics and Information Technology,Shaanxi Normal University,Xi’an 710062,China

出　　处：《Chinese Physics B》2023年第4期389-396,共8页中国物理B（英文版）

基　　金：Project supported by the Natural Science Foundation of Jilin Province of China(Grant No.20220101031JC)。

摘　　要：The spontaneous emission property ofΛ-type three-level atom driven by the bichromatic field in the anisotropic double-band photonic crystal is calculated by n-times iteration method.The influence of different parameters on atomic spontaneous emission is studied,and the phenomena of atomic spontaneous emission are explained in the dressed state representation.It is found that the spontaneous emission spectra of the atom driven by the bichromatic field presents a multi-peak comb structure.The position of the emission peak is determined by the initial state of the atom,and the interval between the neighboring emission peaks is the detuningδof the bichromatic field.When the ratio between Rabi frequency intensity and the detuningδof the bichromatic field remains unchanged,the intensity of each emitted peak remains invariant.The spontaneously emitted peak can be annihilated in the band gap and enhanced near the band edge in the anisotropic photonic crystals.Meanwhile,we also observe the fluorescence quenching phenomenon in the spontaneous emission spectra.The research in this paper provides the theoretical guidance for the control of atomic spontaneous emission.

关 键 词：photonic crystal bichromatic field spontaneous emission spectra dressed state 

分 类 号：O734[理学—晶体学]