Chinese Optics Letters, Volume. 17, Issue 12, 122401(2019)

Broadband mid-IR antireflective Reuleaux-triangle-shaped hole array on germanium

Haijuan Cheng1,2, Miao Dong1, Qinwen Tan1, Linghai Meng3, Yi Cai1, Jie Jiang2, Weisheng Yang2, Haizheng Zhong3, and Lingxue Wang1、*
Author Affiliations
  • 1Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, Key Laboratory of Photoelectronic Imaging Technology and System, Ministry of Education, School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
  • 2Yunnan KIRO - CH Photonics Co., Ltd., Kunming 650223, China
  • 3School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
  • show less
    Figures & Tables(4)
    Optimal simulated transmittance (red line) of the Reuleaux-triangle-shaped hole array on Ge for T1=1.1 μm, R=1 μm, and r=0.8 μm. Inset (a) is a single Reuleaux-triangle-shaped hole, and (b) shows Reuleaux-triangle-shaped holes forming a closely packed hexagonal array (top view). The polarization direction of the incident light is 0° with the x axis.
    Electric field distributions for a single period of the Reuleaux-triangle-shaped hole array: (a) incident 3–12 μm electromagnetic wave with uniform distribution of field intensity, and (b)–(h) different mid-IR wavelengths passing through the Reuleaux-triangle-shaped holes. The incident light is TE polarized.
    (a) Photograph and (b) SEM micrograph of the fabricated Ge wafer with a Reuleaux-triangle hole array. (c) SEM side view of two Reuleaux-triangle holes.
    (a) Transmission spectra of the fabricated element (yellow line), Ge substrate (2 mm thickness, blue line), updated simulated element with nonuniform hole depths (green dot-dashed line), and the maximum theoretical antireflection on one side (red line). (b) The measured transmittance versus incident angle.
    Tools

    Get Citation

    Copy Citation Text

    Haijuan Cheng, Miao Dong, Qinwen Tan, Linghai Meng, Yi Cai, Jie Jiang, Weisheng Yang, Haizheng Zhong, Lingxue Wang. Broadband mid-IR antireflective Reuleaux-triangle-shaped hole array on germanium[J]. Chinese Optics Letters, 2019, 17(12): 122401

    Download Citation

    EndNote(RIS)BibTexPlain Text
    Save article for my favorites
    Paper Information

    Category: Optics at Surfaces

    Received: Jun. 22, 2019

    Accepted: Aug. 6, 2019

    Posted: Aug. 13, 2019

    Published Online: Nov. 26, 2019

    The Author Email: Lingxue Wang (neobull@bit.edu.cn)

    DOI:10.3788/COL201917.122401

    Topics