Switching of Spontaneous Emission of a Two-level Atom Embedded in One-dimensional Tunable Photonic Crystals
首发时间:2008-03-25
Abstract:We investigate the spontaneous emission of a two-level atom embedded in one-dimensional photonic crystals (PCs). The delay Green function, which captures many of the physically relevant aspects of the problem is deduced from the structure of the one-dimensional PCs. The population involution and distribution of upper level are investigated by utilizing the delay Green function. Especially, it is shown that the spontaneous emission is switched on and off by nonlinear tuning of photonic density of states of the one-dimensional PCs. And we emphasize here that the methodology can also be applied to alternate left-right handed PCs. It is shown that the photon-atom bound state is present even when the atom is embedded in alternate left-right handed material PCs.
keywords: photonic band gap, quantum interference, spontaneous emission
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一维可调光子晶体中二能级原子的自发辐射开关效应
摘要:我们研究了一维光子晶体中二能级原子的自发辐射效应。通过推导体现一维光子晶体热库物理性质的格林函数,我们详细的分析和讨论了上能级粒子数的演化与分布。值得注意的是,我们可以通过调整构成一维光子晶体的其中一种材料的折射率,来实现对光子态密度的控制,进而实现对原子自发辐射的控制。同时我们也指出这种方法也适用于由交替的左-右手材料构成的一维光子晶体。
关键词: 光子带隙、量子干涉、自发辐射
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No.1970421114512064****
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