对称面形光栅TE模的衍射特性  

TE MODE DIFFRACTION CHARACTERISTICS OF SYMMETRIC PROFILE GRATINGS

作　　者：王鹏[1] 徐毓光[1] 余勤跃[1] 

机构地区：[1]中国科学院上海光学精密机械研究所

出　　处：《光子学报》1998年第11期1013-1018,共6页Acta Photonica Sinica

摘　　要：本文采用耦合波方法计算了对称面形光栅的衍射效率，分析了光栅截面面形为正弦、三角形、矩形、梯形光栅衍射效率与光栅周期、沟槽深度的关系，计算了光栅的峰值衍射效率．理论计算表明：合理地选择光栅周期、沟槽深度，对称面形光栅都可以达到很高衍射效率，接近１００％；The diffraction efficiency of symmetric profile grating is calculated basing on the couple wave method.The relations among diffraction efficiency,grating period and groove depth for sine,triangle,square and trapezoid profile are analyzed,at same time,the peak efficiency is presented.We can see that:the peak efficiency happens when the Bragg diffractin condition satisfied and the period equals to the wave length;once the grating period and groove depth are chosen properly,the diffraction efficiency near 100% for all symmetric profile can be achieved theoretically.

关 键 词：耦合波理论 光栅周期 衍射效率 光栅面形 

分 类 号：O436.1[机械工程—光学工程] TH741.6[理学—光学]