| 时域有限差分法分析蚀刻衍射光栅的后向衍射效率 |
| |
| 引用本文： | 文泓桥,吴良,宋军,盛钟延,何赛灵.时域有限差分法分析蚀刻衍射光栅的后向衍射效率[J].光子学报,2002,31(11):1377-1381. |
| |
| 作者姓名： | 文泓桥 吴良 宋军 盛钟延 何赛灵 |
| |
| 作者单位： | 浙江大学现代光学仪器国家重点实验室,光及电磁波研究中心,杭州,310027 |
| |
| 摘 要： | 采用时域有限差分法(FDTD)结合理想匹配层(PML)边界条件及周期性边界条件对两种结构槽面的后向衍射效率进行了分析,在P偏振和S偏振两种情况下,均得到了比传统差分方法和射线近似方法更精确的解.数值计算结果表明:全内反射(TIR)结构在高折射率材料(如InP)的蚀刻衍射光栅(EDG)中很有效,而在低折射率材料(如SiO2)的EDG中效果不理想.
|
| 关 键 词： | 时域有限差分法(FDTD) 蚀刻衍射光栅(EDG) 全内反射(TIR) 后向衍射 理想匹配层(PML) 波分复用(WDM) |
| 收稿时间： | 2002-01-28 |
ANALYSIS OF RETRO-DIFFRACTION EFFICIENCY FOR ETCHED DIFFRACTION GRATINGS USING A FDTD METHOD |
| |
| Abstract.ANALYSIS OF RETRO-DIFFRACTION EFFICIENCY FOR ETCHED DIFFRACTION GRATINGS USING A FDTD METHOD[J].Acta Photonica Sinica,2002,31(11):1377-1381. |
| |
| Authors: | Abstract |
| |
| Institution: | State Key Laboratory for Modern Optical Instrumetation, Center for Optical and Electromagnetic Research, Zhejiang University, Hangzhou 310027 |
| |
| Abstract: | The analysis of retro-diffraction in Etched Diffraction Grating (EDG) is given in the present paper by using a Finite-Difference Time-Domain (FDTD) method combined with perfectly matched layers (PML) and a periodic boundary condition.This numerical method is more accurate and reliable than other methods such as the ray approximation method or the differential method.Numerical simulation is given for both P-polarized and S-polarized lights.It is shown that the total internal reflection (TIR) structure is effective for high refractive index(e.g.InP) based gratings,but it doesn′t perform well for low refractive index(e.g.silica) based gratings. |
| |
| Keywords: | Finite-difference time-domain(FDTD) method Etched diffraction grating(EDG) Total internal reflect(TIR) Retro-diffraction Perfectly matched layer (PML) Wavelength-division multiplexing(WDM) |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《光子学报》浏览原始摘要信息 |
| 点击此处可从《光子学报》下载免费的PDF全文 |
