Modal analysis of 1 × 3 reflective triangular gratings under normal incidence

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2017,（4）
• 页码范围: 22-26
• 页数: 5页
• 语种: 英文
• DOI: 10.3788/COL201715.040902

摘要

Modal analysis of the 1 × 3 highly efficient reflective triangular grating operating in the 800 nm wavelength under normal incidence for TE polarization is presented in this Letter.The rigorous coupled wave analysis and simulated annealing algorithm are used to design this beam splitter.The reflective grating consists of a highly reflective mirror and a transmission grating on the top.The mechanism of the reflective triangular grating is clarified by the simplified modal method.Then.gratings are fabricated by direct laser writing lithography.