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.
出处
《光子学报》
EI
CAS
CSCD
1998年第11期1013-1018,共6页
Acta Photonica Sinica
关键词
耦合波理论
光栅周期
衍射效率
光栅面形
Couple wave theory
Grating period
Diffraction efficiency
Grating profile
Groove depth
