Dual-function beam splitter of high contrast gratings

• 作者: Wen-Jing Fang Xin-Ye Fan Hui-Juan Niu Xia Zhang Heng-Ying Xu Cheng-Lin Bai
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: ELECTROMAGNETISM,OPTICS,ACOUSTICS,HEAT TRANSFER,CLASSICAL MECHANICS,AND FLUID DYNAMICS
• 页码范围: 285-290
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/1674-1056/abd68d

摘要

We present the design and fabrication of a novel dual-function high contrast gratings that can be used as a polarization-selective beam splitter with transverse magnetic polarization,which performs two independent functions,i.e.,reflection focusing and power equalization at a wavelength of 1550 nm.This dual-function grating profile is optimized by the rigorous coupled-wave analysis and the finite-element method.Simple analytical expressions of phase and modal guideline for the beam splitter design are given.The beam splitter based on the grating structure is experimentally studied at a distance of 160 pm from the reflection plane,the results are consistent with the theoretical results basically.