中国物理B ›› 2021, Vol. 30 ›› Issue (4): 44205-.doi: 10.1088/1674-1056/abd68d

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  • 收稿日期:2020-10-14 修回日期:2020-12-13 接受日期:2020-12-24 出版日期:2021-03-16 发布日期:2021-04-12

Dual-function beam splitter of high contrast gratings

Wen-Jing Fang(房文敬)1, Xin-Ye Fan(范鑫烨)1, Hui-Juan Niu(牛慧娟)1,2, Xia Zhang (张霞)1, Heng-Ying Xu(许恒迎)1, and Cheng-Lin Bai(白成林)1,†   

  1. 1 Shandong Provincial Key Laboratory of Optical Communication Science and Technology, School of Physical Science and Information Engineering, Liaocheng University, Liaocheng 252000, China; 2 Institute of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications (BUPT); State Key Laboratory of Information Photonics and Optical Communications, Beijing 100876, China
  • Received:2020-10-14 Revised:2020-12-13 Accepted:2020-12-24 Online:2021-03-16 Published:2021-04-12
  • Contact: †Corresponding author. E-mail: baichenglin@lcu.edu.cn
  • Supported by:
    Project supported by the Open Fund of the State Key Laboratory of Information Photonics and Optical Communication, Beijing University of Posts and Telecommunications, China (Grant No. IPOC2019A009) and the National Natural Science Foundation of China (Grant Nos. 61501214 and 61501213).

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Abstract: 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 μ m from the reflection plane, the results are consistent with the theoretical results basically.

Key words: beam splitter, high contrast gratings, polarization-selective, focusing, phase modulation

中图分类号:  (Gratings)

  • 42.79.Dj
42.79.Fm (Reflectors, beam splitters, and deflectors) 42.68.Mj (Scattering, polarization) 42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation)