Coherent control of spontaneous emission of a three-level atom in a coherent photonic band gap reservoir

摘要

By studying the fluorescence and optical properties of a three-level system,we propose a new point of view on the coherent control of these spectra. Withthe definite phase difference between the fields of the air band and dielectricband in photonic band gap (PBG) reservoirs, the spectra of spontaneousemission, absorption, and dispersion exhibit the coherent property and quantuminterference effect. This coherent interference depending on the position ofthe embedded atom and the width of band gap causes the coupling of thefree-space light and the PBG light to result in blue shift of spectra and theappearance of dark lines and kinks. By coherently controlling theposition-dependent dispersion, we can tune the frequency of slow light.