Spontaneous emission from a three-level atom placed in three-dimensional photonic crystals in the long-time limit
Spontaneous emission from a three-level atom placed in three-dimensional photonic crystals in the long-time limit
复制标题
放置在三维光子晶体中的三能级原子在长时间极限下的自发发射
DOI：
10.1080/09500340110105920
复制
发表时间：
2002
影响因子：
1.3
通讯作者：
A. Okamoto
中科院分区：
文献类型：
--
作者：
H. Nihei;A. Okamoto
本文研究了置于周期性介质微结构中的三能级原子的自发辐射，该微结构具有完整的三维光子带隙。通过使用欧拉方法，针对拉比频率与原子跃迁频率与上带边的失调之间的广泛关系，计算了原子的上能级布居。结果表明，拉比频率与失谐量的关系存在三种情况，它们决定了原子布居数在长时间内的不同状态。当失谐量大于拉比频率时，上能级的稳态原子布居数为零，导致自发辐射增强。当失谐量小于拉比频率时，上能级具有非零稳态原子布居，这导致自发辐射的抑制。当负失谐量大于拉比频率时，由于原子的长时间分裂，上能级原子布居数保持不变。自发辐射的这三个性质与原子尺度上的几种光学器件有关，如光学存储器、开关和时钟。
The paper describes the spontaneous emission from a three-level atom placed in a periodic dielectric microstructure which exhibits a complete three-dimensional photonic band gap. By using the Euler approach, the upper level population of the atom is calculated for a wide range of relationships between the Rabi frequency and the detuning of the atomic transition frequency from the upper band edge. The results indicate that there are three cases of the relationship between Rabi frequency and detuning, which determine distinctive states of the atomic population in the long-time limit. When the detuning is greater than the Rabi frequency, the upper level has a zero steady-state atomic population, which leads to enhancement of spontaneous emission. When the magnitude of the detuning is less than the Rabi frequency, the upper level has a nonzero steady-state atomic population, which leads to suppression of spontaneous emission. When the negative detuning is greater than the Rabi frequency, the upper level has a nondecaying oscillatory-state atomic population due to long-time atomic splitting. These three properties of the spontaneous emission are relevant to several optical devices on an atomic scale, such as optical memories, switches and clocks.