Spectral line suppression and sideband narrowing via quantum interference

✍ Scribed by Qing Xu; Xiangming Hu; Hongju Guo; Jingyan Li; Xiaoxia Li; Wenxing Shi

• Book ID: 103872624
• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 267 KB
• Volume: 265
• Category: Article
• ISSN: 0030-4018
• DOI: 10.1016/j.optcom.2006.03.055

✦ Synopsis

We reveal that for a realistic system, interference effects are obtained such as the suppression of central line and inner sidebands and the narrowing of the outer fluorescence sidebands. For this purpose, we consider a spontaneous decay from an excited state to a metastable state when the excited and metastable states are resonantly coupled to an auxiliary metastable state by a laser field and a microwave field, respectively. The fluorescence spectrum evolves from a five-peaked structure into a doublet of ultrasharp lines as the ratio of the laser field Rabi frequency to the microwave Rabi frequency is decreased. The physical origin is presented in terms of dressed states.