The impact of loss on high-Q resonant metasurfaces: A case study for heated a-Si:H

Barreda A, Kuppadakkath A, Ghazaryan L, Gan Z, Koshelev K, Bucher T, Pertsch T, George A, Turchanin A, Szeghalmi A, Kivshar Y, Choi DY, Staude I, Eilenberger F (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Journal of Quantitative Spectroscopy & Radiative Transfer Elsevier

Book Volume: 292

Article Number: 108348

DOI: 10.1016/j.jqsrt.2022.108348

Abstract

The excitation of quasi bound states in the continuum (q-BIC) resonances has been demonstrated in the last years to be useful for lasing, non-linear effects, sensing, or photoluminescence enhancement. In particular, the usage of q-BIC resonances in all-dielectric hydrogenated amorphous silicon (a-Si:H) metasurfaces for enhancing the light-matter interaction with 2D materials has been recently proposed. Growing 2D material directly on the metasurface requires heating to high temperatures, changing the metasurface optical properties (absorption increase). This fact makes necessary to consider the effect of losses on the excitation of q-BIC resonances. Here, we study the influence of absorption losses on the Q-factor values of an a-Si:H metasurface designed to exhibit a q-BIC resonance in the visible spectral region. As a concrete example, we investigate the consequences of heating the metasurface under investigation. We demonstrate that the increase in the optical losses decreases the Q-factor values or even prevents the excitation of the q-BIC resonance in the metasurface. This work may pave the way for the design of metasurfaces suitable for growing 2D materials directly on the metasurface. This integration scheme can resolve many challenges associated with the present transfer-based method for the coupling of 2D materials to metasurfaces.

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE) Australian National University (ANU) AU Australia (AU)

How to cite

APA:

Barreda, A., Kuppadakkath, A., Ghazaryan, L., Gan, Z., Koshelev, K., Bucher, T.,... Eilenberger, F. (2022). The impact of loss on high-Q resonant metasurfaces: A case study for heated a-Si:H. Journal of Quantitative Spectroscopy & Radiative Transfer, 292. https://dx.doi.org/10.1016/j.jqsrt.2022.108348

MLA:

Barreda, Angela, et al. "The impact of loss on high-Q resonant metasurfaces: A case study for heated a-Si:H." Journal of Quantitative Spectroscopy & Radiative Transfer 292 (2022).

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