Spatially Inhomogeneous Gain Modification in Photonic Crystals  

作　　者：李飞 黄翊东 张巍 彭江得 

机构地区：[1]Tsing Hua Univ, Dept Elect Engn, Beijing 100084, Peoples R China

出　　处：《Chinese Physics Letters》2006年第8期2117-2120,共4页中国物理快报（英文版）

基　　金：Supported by, the National Natural Science Foundation of China under Grant No 60537010.

摘　　要：The electric and magnetic energy distributions in photonic crystals （PC） are calculated by using the plane wave expansion （PWE） method. Even though the total electric and magnetic energy in each unit cell of photonic crystals are equal to each other, the ratio of electric and magnetic energy densities varies depending on the local position. Based on Fermi＇s golden rule, the optical gain is analysed in the full quantum framework that takes the nonuniform energy density ratio into account. This nonuniform energy density ratio in photonic crystals, defined in an equal form as gain modification factor, leads to spatially inhomogeneous modification of optical gain. Results reported in the paper provide a new perspective for analysing gain characteristics, as well as the lasing properties, in photonic crystals.The electric and magnetic energy distributions in photonic crystals （PC） are calculated by using the plane wave expansion （PWE） method. Even though the total electric and magnetic energy in each unit cell of photonic crystals are equal to each other, the ratio of electric and magnetic energy densities varies depending on the local position. Based on Fermi＇s golden rule, the optical gain is analysed in the full quantum framework that takes the nonuniform energy density ratio into account. This nonuniform energy density ratio in photonic crystals, defined in an equal form as gain modification factor, leads to spatially inhomogeneous modification of optical gain. Results reported in the paper provide a new perspective for analysing gain characteristics, as well as the lasing properties, in photonic crystals.

关 键 词：SPONTANEOUS EMISSION THRESHOLD GAIN DISTRIBUTED-FEEDBACK LASEROSCILLATION OPTICAL GAIN BAND-GAPS ENHANCEMENT LATTICE 

分 类 号：O43[机械工程—光学工程] TN24[理学—光学]