Silicon-coated gold nanodiffraction grating structures as plasmonic absorbers for short-wavelength infrared light

• Tsubota, Tatsuya

• Arai, Naoyuki

• Harada, Atsuya

• Uesugi, Akio

• Sugano, Koji

• Isono, Yoshitada

Abstract

As a plasmonic absorber for short-wavelength infrared hyperspectral imaging, a silicon-coated gold nanodiffraction grating structure is proposed. This plasmonic absorber leads to absorption peaks in short-wavelength infrared region by the high refractive index of silicon coating on gold grating. It is relatively easy to fabricate with smaller size than those of already known absorbers. By performing fabrication, simulation, and measurement, we demonstrate the sharp absorption peaks of short-wavelength infrared light using only 400–1000 nm grating interval. We believe this miniaturized absorber will be able to be applied to hyperspectral imaging without a spectroscope owing to its sharp absorption peak at a specific wavelength.

Journal

• Journal of the Optical Society of America B

  Journal of the Optical Society of America B 38 (10), 2863-2872, 2021-10-01

  Optica Publishing Group

Keywords

• Atomic and Molecular Physics, and Optics
• Statistical and Nonlinear Physics

Details

• CRID: 1050012570391387648
• NII Article ID: 120007165706
• NII Book ID: AA10643523
• DOI: 10.1364/josab.427768
• ISSN: 15208540
• ISSN: 07403224
• HANDLE: 20.500.14094/90008701
• Web Site: https://opg.optica.org/viewmedia.cfm?URI=josab-38-10-2863&seq=0
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • Crossref
  • CiNii Articles
  • KAKEN