Nonradiating Silicon Nanoantenna Metasurfaces as Narrowband Absorbers

Chi Yin Yang; Jhen Hong Yang; Zih Ying Yang; Zhong Xing Zhou; Mao Guo Sun; Viktoriia E. Babicheva; Kuo-Ping Chen

doi:10.1021/acsphotonics.7b01186

Nonradiating Silicon Nanoantenna Metasurfaces as Narrowband Absorbers

Chi Yin Yang, Jhen Hong Yang, Zih Ying Yang, Zhong Xing Zhou, Mao Guo Sun, Viktoriia E. Babicheva, Kuo-Ping Chen^*

^*Corresponding author for this work

Institute of Imaging and Biomedical Photonics

Research output: Contribution to journal › Article › peer-review

53 Scopus citations

Abstract

High-refractive-index (HRI) nanostructures support optically induced electric dipole (ED) and magnetic dipole (MD) modes that can be used to control scattering and achieve narrowband absorption. In this work, a high-absorptance device is proposed and realized by using amorphous silicon nanoantenna (a-Si NA) arrays that suppress backward and forward scattering with engineered structures and in particular periods. The overlap of ED and MD resonances, by designing an array with a specific period and exciting lattice resonances, is experimentally demonstrated. The absorptance of a-Si NA arrays increases 3-fold in the near-infrared range in comparison to unpatterned silicon films. Nonradiating a-Si NA arrays can achieve high absorptance with a small resonance bandwidth (Q = 11.89) at a wavelength of 785 nm. The effect is observed not only due to the intrinsic loss of material but by overlapping the ED and MD resonances.

Original language	English
Pages (from-to)	2596-2601
Number of pages	6
Journal	ACS Photonics
Volume	5
Issue number	7
DOIs	https://doi.org/10.1021/acsphotonics.7b01186
State	Published - 18 Jul 2018

Keywords

absorber
dielectric nanoantennas
high-refractive-index (HRI)
metasurfaces

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title = "Nonradiating Silicon Nanoantenna Metasurfaces as Narrowband Absorbers",

abstract = "High-refractive-index (HRI) nanostructures support optically induced electric dipole (ED) and magnetic dipole (MD) modes that can be used to control scattering and achieve narrowband absorption. In this work, a high-absorptance device is proposed and realized by using amorphous silicon nanoantenna (a-Si NA) arrays that suppress backward and forward scattering with engineered structures and in particular periods. The overlap of ED and MD resonances, by designing an array with a specific period and exciting lattice resonances, is experimentally demonstrated. The absorptance of a-Si NA arrays increases 3-fold in the near-infrared range in comparison to unpatterned silicon films. Nonradiating a-Si NA arrays can achieve high absorptance with a small resonance bandwidth (Q = 11.89) at a wavelength of 785 nm. The effect is observed not only due to the intrinsic loss of material but by overlapping the ED and MD resonances.",

keywords = "absorber, dielectric nanoantennas, high-refractive-index (HRI), metasurfaces",

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AU - Yang, Chi Yin

AU - Yang, Jhen Hong

AU - Yang, Zih Ying

AU - Zhou, Zhong Xing

AU - Sun, Mao Guo

AU - Babicheva, Viktoriia E.

AU - Chen, Kuo-Ping

PY - 2018/7/18

Y1 - 2018/7/18

N2 - High-refractive-index (HRI) nanostructures support optically induced electric dipole (ED) and magnetic dipole (MD) modes that can be used to control scattering and achieve narrowband absorption. In this work, a high-absorptance device is proposed and realized by using amorphous silicon nanoantenna (a-Si NA) arrays that suppress backward and forward scattering with engineered structures and in particular periods. The overlap of ED and MD resonances, by designing an array with a specific period and exciting lattice resonances, is experimentally demonstrated. The absorptance of a-Si NA arrays increases 3-fold in the near-infrared range in comparison to unpatterned silicon films. Nonradiating a-Si NA arrays can achieve high absorptance with a small resonance bandwidth (Q = 11.89) at a wavelength of 785 nm. The effect is observed not only due to the intrinsic loss of material but by overlapping the ED and MD resonances.

AB - High-refractive-index (HRI) nanostructures support optically induced electric dipole (ED) and magnetic dipole (MD) modes that can be used to control scattering and achieve narrowband absorption. In this work, a high-absorptance device is proposed and realized by using amorphous silicon nanoantenna (a-Si NA) arrays that suppress backward and forward scattering with engineered structures and in particular periods. The overlap of ED and MD resonances, by designing an array with a specific period and exciting lattice resonances, is experimentally demonstrated. The absorptance of a-Si NA arrays increases 3-fold in the near-infrared range in comparison to unpatterned silicon films. Nonradiating a-Si NA arrays can achieve high absorptance with a small resonance bandwidth (Q = 11.89) at a wavelength of 785 nm. The effect is observed not only due to the intrinsic loss of material but by overlapping the ED and MD resonances.

KW - absorber

KW - dielectric nanoantennas

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KW - metasurfaces

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JO - ACS Photonics

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SN - 2330-4022

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Nonradiating Silicon Nanoantenna Metasurfaces as Narrowband Absorbers

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