Nonlinear optical properties and superluminal propagation in the ruby  

作　　者：GAO Feng1,2,3,XU JingJun1,2,3,ZHANG GuoQuan1,2,3 & ZHANG WenDing1,2,3 1 Photonics Center,College of Physics Science,Nankai University,Tianjin 300457,China 2 The Key Laboratory of Advanced Technique and Fabrication for Weak-Light Nonlinear Photonics Materials of Ministry of Education,Nankai University,Tianjin 300457,China 3 Tianjin Key Laboratory of Photonics Materials and Technology for Information Science,Nankai University,Tianjin 300457,China 

出　　处：《Chinese Science Bulletin》2010年第6期473-477,共5页

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.60678021,10804055);111 Project (Grant No.B07013);the Cultivation Fund of the Key Scientific and Technical Innovation Project,Ministry of Education of China (Grant No.708022);the National Basic Research Program of China (Grant No.2010CB934101);CNKBRSF (Grant No.2006CB921703)

摘　　要：In this review article,we summarized the study of the weak light nonlinear properties associated with group velocity change in the ruby.The ruby could be reduced to a two-level system,in which population oscillations could lead to a subluminal result.With the modulated TEM00 beam introduced into the ruby,self-phase modulation together with Fraunhofer diffractions and nondegenerate two-wave coupling between different spatial frequency components of the beam occurs at the same time.Population oscillations,self-phase modulation together with Fraunhofer diffractions and nondegenerate two-wave coupling mechanism competes with each other,which brings a new phenomenon of self-superluminal group velocity propagation in the ruby.In this review article, we summarized the study of the weak light nonlinear properties associated with group velocity change in the ruby. The ruby could be reduced to a two-level system, in which population oscillations could lead to a subluminal result. With the modulated TEM00 beam introduced into the ruby, self-phase modulation together with Fraunhofer diffractions and nondegenerate two-wave coupling between different spatial frequency components of the beam occurs at the same time. Population oscillations, self-phase modulation together with Fraunhofer diffractions and nondegenerate two-wave coupling mechanism competes with each other, which brings a new phenomenon of self-superluminal group velocity propagation in the ruby.

关 键 词：非线性光学性质 超光速传播 红宝石 自相位调制 TEM00模 速度变化 光束耦合 空间频率 

分 类 号：P619.281[天文地球—矿床学]