Interference-enhanced absorption of visible and near-infrared radiation in ultrathin film coatings

TitleInterference-enhanced absorption of visible and near-infrared radiation in ultrathin film coatings
Publication TypeJournal Article
Year of Publication2021
AuthorsV. Medvedev, V. Gubarev, E. Zoethout, N.N. Novikova
JournalIEEE Photonics Technology Letters
Volume33
Issue22
Pagination1242-1245
Date Published11/2021
Abstract

We report the interference-enhanced absorption of electromagnetic radiation in two-layer lossy coatings on metal substrates. The conditions for the complete absorption of monochromatic radiation are described in comparison with those in previously studied single-layer coatings. Proof-of-principle measurements of the interference-enhanced absorption in the near-infrared range are presented for silicon-on-germanium coatings on aluminum substrates. We also provide various examples of materials that can be used to create similar light-absorbing coatings for visible and near-infrared ranges. The proposed design can be applied to optical filters, optoelectronic devices, photodetectors, and light-emitting devices.

DOI10.1109/LPT.2021.3102149
Division

MaSF

Department

SFFI

PID66aa9acbbfeb591bf8ce07b713411e46
Alternate TitleIEEE Photon. Technol. Lett.
LabelOA
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