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Proceedings Paper

Tailoring the enhanced transmission and absorption in 1D subwavelength semiconductor-based metamaterial high-contrast gratings (Conference Presentation)
Author(s): Andrzej Gawlik; Janusz Bogdanowicz; Andreas Schulze; Jan Misiewicz; Wilfried Vandervorst

Paper Abstract

We demonstrate how to tailor the size-dependent enhanced transmission and absorption of 1D subwavelength semiconductor-based metamaterial high contrast gratings. We focus on 3 spectral regimes generic for most semiconductors, where the refractive index (n) and extinction coefficient (k) of the semiconducting material satisfy the following conditions: n >> k, n ~ k and n < k. We show that the transmission into such structures can be enhanced by reducing the bar width, increasing the grating period, or tapering the grating sidewalls. Moreover, thanks to the slow-light phenomenon, the absorption of the grating can be enhanced as compared to bulk semiconductors.

Paper Details

Date Published: 10 March 2020
Proc. SPIE 11290, High Contrast Metastructures IX, 112901H (10 March 2020); doi: 10.1117/12.2544800
Show Author Affiliations
Andrzej Gawlik, IMEC (Belgium)
KU Leuven (Belgium)
Wroclaw Univ. of Science and Technology (Poland)
Janusz Bogdanowicz, IMEC (Belgium)
Andreas Schulze, Applied Materials, Inc. (United States)
Jan Misiewicz, Wroclaw Univ. of Science and Technology (Poland)
Wilfried Vandervorst, IMEC (Belgium)

Published in SPIE Proceedings Vol. 11290:
High Contrast Metastructures IX
Connie J. Chang-Hasnain; Andrei Faraon; Weimin Zhou, Editor(s)

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