Chinese Optics Letters, 2008, 6 (2): 0283, Published Online: Mar. 5, 2008
Influence of dielectric microcavity on the spontaneous emission rate of atom: a perspective on the closed-orbit theory of photons Download: 635次
介质夹层微腔 自发辐射率 闭合轨道理论 零点电磁场涨落 020.0020 Atomic and molecular physics 020.4900 Oscillator strengths 070.2590 ABCD transforms 270.5580 Quantum electrodynamics
Abstract
The formulas of the quantum electrodynamics have been applied to calculate the spontaneous emission rate of excited atom in dielectric microcavity. The results exhibit damping oscillating patterns which depend sensitively on the scaling parameter and geometrical structure. Compared with the case that the emitting atom is immersed in dielectric, the spontaneous emission rate is depressed obviously and the center or the mean value of the oscillations is intimately related to the real refractive index of the local position where the atom is. In order to explain this phenomenon, we utilize the closed-orbit theory to deal with the classical trajectories of the emitted photon, and extract the corresponding frequencies of the oscillations by Fourier transform. It is found that the oscillations can be represented in terms of the closed-orbits of the photon motion constrained in dielectric microcavity, thus providing another perspective on the spontaneous emission of atom sandwiched by dielectric slabs.
Shubao Wang, Xueyou Xu, Hongyun Li, Zhengmao Jia, Shenglu Lin. Influence of dielectric microcavity on the spontaneous emission rate of atom: a perspective on the closed-orbit theory of photons[J]. Chinese Optics Letters, 2008, 6(2): 0283.