Spontaneous emission in the presence of a dielectric cylinder
Spontaneous emission in the presence of a dielectric cylinder
复制标题
存在介电圆柱体时的自发发射
DOI：
10.1103/physreva.62.013820
复制
发表时间：
2000
影响因子：
2.9
通讯作者：
M. Janowicz
中科院分区：
文献类型：
--
作者：
W. Żakowicz;M. Janowicz
利用全局自由电磁模分析了置于介质圆柱波导附近任意位置的原子的光子自发辐射，并满足了平板边界处的连续性条件。这些模式包括在整个空间上延伸的模式（行进）和被捕获到波导的模式（波导）。为了描述自发辐射的角度特性，已提出了由出射波的行进模式的参数化。利用量子方法和标准微扰理论计算了行波光子发射的角度特性、俘获光子发射的分布以及整体衰变率。由于存在尖锐的共振（回音壁模式）之间的旅行光子的困难被指出。
Spontaneous emission of photons by an atom placed near a dielectric cylindrical waveguide at an arbitrary position is analyzed using global free electromagnetic modes, satisfying necessary continuity conditions at the slab boundaries. These modes include the modes extended over the whole space (travelling) and the modes trapped to a waveguide (waveguided). To describe angular properties of the spontaneous emission, a parametrization of the travelling modes by the outgoing waves has been proposed. Angular characteristics of the travelling photon emission, distributions of the trapped photon emission, as well as the global decay rates have been calculated using the quantum approach and the standard perturbation theory. Difficulties due to the presence of sharp resonances (whispering gallery modes) among the travelling photons are pointed out.