Enhanced light absorption in Tamm metasurface with a bound state in the continuum
Optics
2023-06-28 v1
Abstract
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.
Keywords
Cite
@article{arxiv.2301.04346,
title = {Enhanced light absorption in Tamm metasurface with a bound state in the continuum},
author = {Rashid G. Bikbaev and Dmitrii N. Maksimov and Pavel S. Pankin and Ming-Jyun Ye and Kuo-Ping Chen and Ivan V. Timofeev},
journal= {arXiv preprint arXiv:2301.04346},
year = {2023}
}