Structural Color Filters Enabled by a Dielectric Metasurface Incorporating Hydrogenated Amorphous Silicon Nanodisks

Abstract It is advantageous to construct a dielectric metasurface in silicon due to its compatibility with cost-effective, mature processes for complementary metal-oxide-semiconductor devices. However, high-quality crystalline-silicon films are difficult to grow on foreign substrates. In this work,...

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Autores principales:	Chul-Soon Park, Vivek Raj Shrestha, Wenjing Yue, Song Gao, Sang-Shin Lee, Eun-Soo Kim, Duk-Yong Choi
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a2f91f0209514227b8b88463e858b47f
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spelling	oai:doaj.org-article:a2f91f0209514227b8b88463e858b47f2021-12-02T15:05:13ZStructural Color Filters Enabled by a Dielectric Metasurface Incorporating Hydrogenated Amorphous Silicon Nanodisks10.1038/s41598-017-02911-w2045-2322https://doaj.org/article/a2f91f0209514227b8b88463e858b47f2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02911-whttps://doaj.org/toc/2045-2322Abstract It is advantageous to construct a dielectric metasurface in silicon due to its compatibility with cost-effective, mature processes for complementary metal-oxide-semiconductor devices. However, high-quality crystalline-silicon films are difficult to grow on foreign substrates. In this work, we propose and realize highly efficient structural color filters based on a dielectric metasurface exploiting hydrogenated amorphous silicon (a-Si:H), known to be lossy in the visible regime. The metasurface is comprised of an array of a-Si:H nanodisks embedded in a polymer, providing a homogeneously planarized surface that is crucial for practical applications. The a-Si:H nanodisk element is deemed to individually support an electric dipole (ED) and magnetic dipole (MD) resonance via Mie scattering, thereby leading to wavelength-dependent filtering characteristics. The ED and MD can be precisely identified by observing the resonant field profiles with the assistance of finite-difference time-domain simulations. The completed color filters provide a high transmission of around 90% in the off-resonance band longer than their resonant wavelengths, exhibiting vivid subtractive colors. A wide range of colors can be facilitated by tuning the resonance by adjusting the structural parameters like the period and diameter of the a-Si:H nanodisk. The proposed devices will be actively utilized to implement color displays, imaging devices, and photorealistic color printing.Chul-Soon ParkVivek Raj ShresthaWenjing YueSong GaoSang-Shin LeeEun-Soo KimDuk-Yong ChoiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chul-Soon Park Vivek Raj Shrestha Wenjing Yue Song Gao Sang-Shin Lee Eun-Soo Kim Duk-Yong Choi Structural Color Filters Enabled by a Dielectric Metasurface Incorporating Hydrogenated Amorphous Silicon Nanodisks
description	Abstract It is advantageous to construct a dielectric metasurface in silicon due to its compatibility with cost-effective, mature processes for complementary metal-oxide-semiconductor devices. However, high-quality crystalline-silicon films are difficult to grow on foreign substrates. In this work, we propose and realize highly efficient structural color filters based on a dielectric metasurface exploiting hydrogenated amorphous silicon (a-Si:H), known to be lossy in the visible regime. The metasurface is comprised of an array of a-Si:H nanodisks embedded in a polymer, providing a homogeneously planarized surface that is crucial for practical applications. The a-Si:H nanodisk element is deemed to individually support an electric dipole (ED) and magnetic dipole (MD) resonance via Mie scattering, thereby leading to wavelength-dependent filtering characteristics. The ED and MD can be precisely identified by observing the resonant field profiles with the assistance of finite-difference time-domain simulations. The completed color filters provide a high transmission of around 90% in the off-resonance band longer than their resonant wavelengths, exhibiting vivid subtractive colors. A wide range of colors can be facilitated by tuning the resonance by adjusting the structural parameters like the period and diameter of the a-Si:H nanodisk. The proposed devices will be actively utilized to implement color displays, imaging devices, and photorealistic color printing.
format	article
author	Chul-Soon Park Vivek Raj Shrestha Wenjing Yue Song Gao Sang-Shin Lee Eun-Soo Kim Duk-Yong Choi
author_facet	Chul-Soon Park Vivek Raj Shrestha Wenjing Yue Song Gao Sang-Shin Lee Eun-Soo Kim Duk-Yong Choi
author_sort	Chul-Soon Park
title	Structural Color Filters Enabled by a Dielectric Metasurface Incorporating Hydrogenated Amorphous Silicon Nanodisks
title_short	Structural Color Filters Enabled by a Dielectric Metasurface Incorporating Hydrogenated Amorphous Silicon Nanodisks
title_full	Structural Color Filters Enabled by a Dielectric Metasurface Incorporating Hydrogenated Amorphous Silicon Nanodisks
title_fullStr	Structural Color Filters Enabled by a Dielectric Metasurface Incorporating Hydrogenated Amorphous Silicon Nanodisks
title_full_unstemmed	Structural Color Filters Enabled by a Dielectric Metasurface Incorporating Hydrogenated Amorphous Silicon Nanodisks
title_sort	structural color filters enabled by a dielectric metasurface incorporating hydrogenated amorphous silicon nanodisks
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/a2f91f0209514227b8b88463e858b47f
work_keys_str_mv	AT chulsoonpark structuralcolorfiltersenabledbyadielectricmetasurfaceincorporatinghydrogenatedamorphoussiliconnanodisks AT vivekrajshrestha structuralcolorfiltersenabledbyadielectricmetasurfaceincorporatinghydrogenatedamorphoussiliconnanodisks AT wenjingyue structuralcolorfiltersenabledbyadielectricmetasurfaceincorporatinghydrogenatedamorphoussiliconnanodisks AT songgao structuralcolorfiltersenabledbyadielectricmetasurfaceincorporatinghydrogenatedamorphoussiliconnanodisks AT sangshinlee structuralcolorfiltersenabledbyadielectricmetasurfaceincorporatinghydrogenatedamorphoussiliconnanodisks AT eunsookim structuralcolorfiltersenabledbyadielectricmetasurfaceincorporatinghydrogenatedamorphoussiliconnanodisks AT dukyongchoi structuralcolorfiltersenabledbyadielectricmetasurfaceincorporatinghydrogenatedamorphoussiliconnanodisks
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Structural Color Filters Enabled by a Dielectric Metasurface Incorporating Hydrogenated Amorphous Silicon Nanodisks

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