Tailoring the enhanced transmission and absorption in 1D subwavelength semiconductor-based metamaterial high-contrast gratings (Conference Presentation)

Andrzej Gawlik; Janusz Bogdanowicz; Andreas Schulze; Jan Misiewicz; Wilfried Vandervorst

doi:10.1117/12.2544800

10 March 2020 Tailoring the enhanced transmission and absorption in 1D subwavelength semiconductor-based metamaterial high-contrast gratings (Conference Presentation)

Andrzej Gawlik, Janusz Bogdanowicz, Andreas Schulze, Jan Misiewicz, Wilfried Vandervorst

Author Affiliations +

Proceedings Volume 11290, High Contrast Metastructures IX; 112901H (2020) https://doi.org/10.1117/12.2544800
Event: SPIE OPTO, 2020, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Andrzej Gawlik, Janusz Bogdanowicz, Andreas Schulze, Jan Misiewicz, and Wilfried Vandervorst "Tailoring the enhanced transmission and absorption in 1D subwavelength semiconductor-based metamaterial high-contrast gratings (Conference Presentation)", Proc. SPIE 11290, High Contrast Metastructures IX, 112901H (10 March 2020); https://doi.org/10.1117/12.2544800

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