Laser Physics
Properties of the spontaneous emission of a driven four-level atom coupled to separate reservoirs
X. Sun, Hongyan Shi, Xiangqian Jiang
Abstract
We investigate the spontaneous emission properties of a driven four-level atom coupled to separate reservoirs. Both the effect of the external field and the influence of the photonic bandgap reservoir on the atomic spontaneous emission are discussed. It is shown that a few interesting phenomena such as a laser-induced spectral narrowing dark line can be achieved and its physical understanding can be given by invoking the dressedatom approach.