Bragg reflection in a quantum periodic structure

作     者：陈月月 冯勋立 徐至展 刘呈普 

作者机构：State Key Laboratory of High Field Laser PhysicsShanghai Institute of Optics and Fine MechanicsChinese Academy of Sciences University of Chinese Academy of Sciences Department of PhysicsShanghai Normal University 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2015年第13卷第12期

页      面：84-88页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China under Grant Nos.11374318 and 11374315 the 100-Talents Project of the Chinese Academy of Sciences the Department of Human Resources and Social Security of China 

主　　题：Crystal atomic structure Crystal structure Finite difference time domain method Laser optics Maxwell equations Multilayer films Photonic crystals Time domain analysis 

摘      要：We investigate the reflected field for few-cycle ultra-short laser pulses propagating through resonant media embedded within wavelength-scale structures. Full-wave Maxwell–Bloch equations are solved numerically by using the finite-difference time-domain method. The results show that the spectral feature of the reflected spectrum is determined by the Bragg reflection condition, and that the periodic structure of a dense atomic system can be regarded as a one-dimensional photonic crystal and even as a highly reflective multilayer film. Our study explains the suppression of the frequency shifts in the reflected spectrum based on the Bragg reflection theory and provides a method to control the frequency and frequency intervals of the spectral spikes in the reflected spectrum.