Spontaneous emission of an atom in a cavity with nonorthogonal eigenmodes.
The spontaneous emission of an excited atom in a lossy cavity with nonorthogonal eigenmodes is analyzed. The quantum Langevin formalism is used to describe the dynamics of the spontaneous decay. The analysis shows that the spontaneous decay is modified by the Q value and the effective mode volume factor of each cavity eigenmode. The effective mode volume is generalized for cavities with nonorthogonal modes, which can be a very significant modification in the microcavity regime. It is shown that the spontaneous decay is not enhanced by the excess noise factor as claimed by other analyses.
Cheng
Yuh-Jen
YJ
Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan. yjcheng@sinica.edu.tw