Wide-angle wideband polarization-insensitive perfect absorber based on uniaxial anisotropic metasurfaces

Shi Kang Tseng; Hui Hsin Hsiao; Yih Peng Chiou

doi:10.1364/OME.386485

Wide-angle wideband polarization-insensitive perfect absorber based on uniaxial anisotropic metasurfaces

Shi Kang Tseng, Hui Hsin Hsiao, Yih Peng Chiou^*

^*Corresponding author for this work

Graduate Institute of Electro-Optical Engineering

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

9 Citations (Scopus)

Abstract

A wide-angle, wideband, and polarization-insensitive metamaterial (MM) absorber was studied based on the theoretical concept of uniaxial perfect matching layer (UPML) in the terahertz range. The MM absorber was designed as a multi-layered anisotropic array structure consisting of a conductive VIA, a bi-layered slot-FSS, and a split-ring resonator (SRR) separated by porous silica spacers. Each component is optimized to approach the required macroscopic uniaxial property for satisfying the reflection-less boundary condition. The SRRs and VIAs were found to play an important role in maintaining large absorption when the angle of oblique incidence increases under transverse electric (TE) and transverse magnetic (TM) polarization, respectively. The absorption achieves 90% in the frequency regime of 0.9 to 10.5 THz, corresponding to a bandwidth of 168% to the central frequency, and retains such high performance up to 60° oblique incidence for both TE and TM waves.

Original language	English
Pages (from-to)	1193-1203
Number of pages	11
Journal	Optical Materials Express
Volume	10
Issue number	5
DOIs	https://doi.org/10.1364/OME.386485
Publication status	Published - 2020

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

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title = "Wide-angle wideband polarization-insensitive perfect absorber based on uniaxial anisotropic metasurfaces",

abstract = "A wide-angle, wideband, and polarization-insensitive metamaterial (MM) absorber was studied based on the theoretical concept of uniaxial perfect matching layer (UPML) in the terahertz range. The MM absorber was designed as a multi-layered anisotropic array structure consisting of a conductive VIA, a bi-layered slot-FSS, and a split-ring resonator (SRR) separated by porous silica spacers. Each component is optimized to approach the required macroscopic uniaxial property for satisfying the reflection-less boundary condition. The SRRs and VIAs were found to play an important role in maintaining large absorption when the angle of oblique incidence increases under transverse electric (TE) and transverse magnetic (TM) polarization, respectively. The absorption achieves 90% in the frequency regime of 0.9 to 10.5 THz, corresponding to a bandwidth of 168% to the central frequency, and retains such high performance up to 60° oblique incidence for both TE and TM waves.",

author = "Tseng, {Shi Kang} and Hsiao, {Hui Hsin} and Chiou, {Yih Peng}",

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AU - Tseng, Shi Kang

AU - Hsiao, Hui Hsin

AU - Chiou, Yih Peng

PY - 2020

Y1 - 2020

N2 - A wide-angle, wideband, and polarization-insensitive metamaterial (MM) absorber was studied based on the theoretical concept of uniaxial perfect matching layer (UPML) in the terahertz range. The MM absorber was designed as a multi-layered anisotropic array structure consisting of a conductive VIA, a bi-layered slot-FSS, and a split-ring resonator (SRR) separated by porous silica spacers. Each component is optimized to approach the required macroscopic uniaxial property for satisfying the reflection-less boundary condition. The SRRs and VIAs were found to play an important role in maintaining large absorption when the angle of oblique incidence increases under transverse electric (TE) and transverse magnetic (TM) polarization, respectively. The absorption achieves 90% in the frequency regime of 0.9 to 10.5 THz, corresponding to a bandwidth of 168% to the central frequency, and retains such high performance up to 60° oblique incidence for both TE and TM waves.

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Wide-angle wideband polarization-insensitive perfect absorber based on uniaxial anisotropic metasurfaces

Abstract

ASJC Scopus subject areas

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