摘要
研究了处于光子带隙材料中的四能级原子系统的电磁感应透明、自发辐射和光子开关效应,分析了其稳态与瞬态特性,发现特殊的模密度能够导致反常的吸收、色散、自发辐射及瞬态无反转增益,并可以通过外加调制场进行控制.详细讨论了特殊频率处模密度的变化对透明窗口和光子开关效应的影响.
We study the steady and transient optical properties of electromagnetically induced transparency (EIT), spontaneous emission, and the photonic switching for a four-level atomic system embedded in photonic band gap(PBG) structures. The theoretical analysis shows that a special density of modes (DOM) can induce abnormal spectrum of absorption, dispersion, spontaneous emission and transient gain without inversion, and they can be controlled by an externally applied coherent light. Furthermore, we discuss the effects of the nonsingular DOM on the EIT windows and on the photon switch in detail.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第9期4652-4658,共7页
Acta Physica Sinica
基金
清华大学基础研究基金(批准号:JCqn2005037)
国家自然科学基金(批准号:10504016)
国家重点基础研究发展计划(973)项目(批准号:001CB309308)资助的课题.~~
关键词
光子带隙材料
电磁感应透明
模密度
光子开关
photonic band gap structures, electromagnetically induced transparency, density of modes, photon switching