Enhanced light absorption in Tamm metasurface with a bound state in the continuum

Enhanced light absorption in Tamm metasurface with a bound state in the continuum

We consider light absorption in a germanium grating placed on top of photonic-crystalline substrate. Such a system supports an optical Tamm state decoupled from the continuous spectrum with its frequency within the photonic band gap. We have demonstrated that application of the Tamm state makes in p...

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Bibliographic Details
Main Authors: Bikbaev, R.G (Author), Chen, K.-P (Author), Maksimov, D.N (Author), Pankin, P.S (Author), Timofeev, I.V (Author), Ye, M.-J (Author)
Format: Article
Language:English
Published: Elsevier B.V. 2023
Subjects:
Bound state in the continuum
Bound-states
Crystalline substrates
Energy gap
Enhanced light absorptions
Germaniums (Ge)
Light absorption
Metasurface
Optical-
Photonic band gap
Plasmon-polaritons
Systems support
Tamm plasmon polariton
Online Access:View Fulltext in Publisher
Description
Summary:We consider light absorption in a germanium grating placed on top of photonic-crystalline substrate. Such a system supports an optical Tamm state decoupled from the continuous spectrum with its frequency within the photonic band gap. We have demonstrated that application of the Tamm state makes in possible to engineer extremely narrow absorber which provides a 100 % absorption in a semiconductor grating in the critical coupling regime. The proposed design may be used at both normal and oblique incidence at the telecom wavelength. © 2023 Elsevier B.V.
ISBN:15694410 (ISSN)
ISSN:15694410 (ISSN)
DOI:10.1016/j.photonics.2023.101148

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