Degenerate cascade fluorescence: Optical spectral-line narrowing via a single microwave cavity  

作　　者：Liang Hu Xiang-Ming Hu Qing-Ping Hu 胡亮;胡响明;胡庆平(College of Physical Science and Technology,Central China Normal University,Wuhan 430079,China)

机构地区：[1]College of Physical Science and Technology,Central China Normal University,Wuhan 430079,China

出　　处：《Chinese Physics B》2021年第6期346-358,共13页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grants Nos. 61875067 and 61178021)。

摘　　要：For a three-level atom, two nondegenerate(even microwave and optical) electric dipole transitions are usually allowed;for either of these, the fluorescence spectra are well-described in terms of spontaneous transitions from a triplet of dressed sublevels to an adjacent lower-lying triplet. When the three dressed sublevels are equally spaced from each other, a remarkable feature known as degenerate cascade fluorescence takes place, which displays a five-peaked structure. We show that a single cavity can make all the spectral lines extremely narrow, whether they arise from cavity-coupled or cavity-free transitions. This effect is based on intrinsic cascade lasing feedback and makes it possible to use a single microwave cavity(even a bad cavity) to narrow the spectral lines in the optical frequency regime.

关 键 词：resonance fluorescence narrow spectral lines microwave cavity 

分 类 号：O562[理学—原子与分子物理]