【摘要】 光子晶体中光子带隙的存在使得频率在带隙内的光无法通过光子晶体 ,镶嵌在光子晶体中的原子的自发辐射必然不同于在均匀介质中原子的自发辐射。关于二能级原子和V型三能级原子在光子晶体中的自发辐射已有文献报道 ,采用的方法是用拉普拉斯变换求解薛定鄂方程。用求系统本征值的方法讨论了光子晶体中单个三能级原子的自发辐射。讨论的模型为Ξ型三能级原子。由于光的局域化 ,两个上能级的粒子数布居取决于两个上能级之间跃迁频率相对于光子带隙边缘频率ωc 的大小 ,当两个上能级之间跃迁频率位于带隙内时 ,两个上能级的粒子数布居出现了反转。这一性质区别于V型三能级原子在光子晶体中的自发辐射更多还原

【Abstract】 The band gap in the crystal for photons leads that the light with frequency in the band gap can not go through the photonic crystal. Spontaneous emission from atom in photonic crystal is different from that of atom in other medium. Spontaneous emission from a three-level atom embedded in the photonic crystal is studied with the solution for eigenvalue problem of atom-field trapped state. A model of Ξ type for three-level atom has been discussed. Because of the localization of light, the population of particles in the two upper levels depends on the transition frequency between the two upper levels. When the transition frequency between the two upper levels is within the forbidden band-gap, there is population inversion in the two upper levels, which differs from that of the two-level atom and other three-level atoms in a photonic crystal.更多还原