Bilayered nanoantenna design improves the performance of silicon metasurfaces in the visible-wavelength region

Krupali D. Donda; Ravi Sadananda Hegde

doi:10.1117/1.JNP.11.046002

12 October 2017 Bilayered nanoantenna design improves the performance of silicon metasurfaces in the visible-wavelength region

Krupali D. Donda, Ravi Sadananda Hegde

Author Affiliations +

Journal of Nanophotonics, Vol. 11, Issue 4, 046002 (October 2017). https://doi.org/10.1117/1.JNP.11.046002

Abstract

High-transmissivity all-dielectric metasurfaces have recently attracted attention toward the realization of ultracompact optical devices and systems. Silicon-based metasurfaces, in particular, are highly promising considering the possibility of monolithic integration with complementary metal–oxide–semiconductor very large scale integration circuits. Realization of silicon-based metasurfaces operational in the visible wavelengths, however, remains a challenge. A numerical study of bilayered truncated-cone shaped nanoantenna elements is presented. Metasurfaces based on the proposed stepped conical geometry can be designed for operation in the 700- to 800-nm wavelength window and can achieve full-cycle phase response (0 to 2π) with an improved transmittance in comparison with the previously reported cylindrical geometry. A systematic parameter study of the influence of various geometrical parameters on the achievable amplitude and phase coverage is reported.

Citation Download Citation

Krupali D. Donda and Ravi Sadananda Hegde "Bilayered nanoantenna design improves the performance of silicon metasurfaces in the visible-wavelength region," Journal of Nanophotonics 11(4), 046002 (12 October 2017). https://doi.org/10.1117/1.JNP.11.046002

Received: 27 April 2017; Accepted: 18 September 2017; Published: 12 October 2017

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