Zhou Yun-Song, Wang Xue-Hua, Gu Ben-Yuan, Wang Fu-He
Department of Physics, Capital Normal University, Beijing 100037, China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2005 Jul;72(1 Pt 2):017601. doi: 10.1103/PhysRevE.72.017601. Epub 2005 Jul 15.
The lifetime distribution functions of the spontaneous emission (SE) of the excited atoms embedded in two-dimensional (2D) photonic crystals (PCs) with square lattice, consisting of square air rods in dielectric medium with different filling factors, are calculated by using the plane wave expansion method. The numerical results show that the SE in the 2D PCs cannot be prohibited completely but it can be inhibited intensively by the pseudo-PBG of the PCs. In the pseudoband edges, the SE is accelerated obviously. The reduced average lifetime of the excited atoms and the extension of the reduced lifetime distribution in the 2D PCs both are the same as those in the 3D PCs in the order of magnitude. Our results provide an available way to control the behavior of the SE by changing the structures of the 2D PCs.
采用平面波展开法计算了二维正方晶格光子晶体中嵌入的激发原子的自发辐射寿命分布函数，该光子晶体由不同填充因子的介质中的方形空气柱组成。数值结果表明，二维光子晶体中的自发辐射不能被完全禁止，但可以被光子晶体的赝带隙强烈抑制。在赝带边缘，自发辐射明显加速。二维光子晶体中激发原子平均寿命的缩短和寿命分布的展宽在数量级上与三维光子晶体中的情况相同。我们的结果为通过改变二维光子晶体的结构来控制自发辐射行为提供了一种可行的方法。
