Ultrabroadband light absorption by a sawtooth anisotropic metamaterial slab

Yanxia Cui; Kin Hung Fung; Jun Xu; Hyungjin Ma; Yi Jin; Sailing He; Nicholas X. Fang

doi:10.1021/nl204118h

Ultrabroadband light absorption by a sawtooth anisotropic metamaterial slab

Yanxia Cui, Kin Hung Fung, Jun Xu, Hyungjin Ma, Yi Jin, Sailing He, Nicholas X. Fang

Research output: Journal article publication › Journal article › Academic research › peer-review

925 Citations (Scopus)

Abstract

We present an ultrabroadband thin-film infrared absorber made of sawtoothed anisotropic metamaterial. Absorptivity of higher than 95% at normal incidence is supported in a wide range of frequencies, where the full absorption width at half-maximum is about 86%. Such property is retained well at a very wide range of incident angles too. Light of shorter wavelengths are harvested at upper parts of the sawteeth of smaller widths, while light of longer wavelengths are trapped at lower parts of larger tooth widths. This phenomenon is explained by the slowlight modes in anisotropic metamaterial waveguide. Our study can be applied in the field of designing photovoltaic devices and thermal emitters.

Original language	English
Pages (from-to)	1443-1447
Number of pages	5
Journal	Nano Letters
Volume	12
Issue number	3
DOIs	https://doi.org/10.1021/nl204118h
Publication status	Published - 14 Mar 2012
Externally published	Yes

Keywords

absorber
anisotropic
metamaterials
Slow light
thin film
ultrabroadband

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Condensed Matter Physics
Mechanical Engineering

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/nl204118h

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abstract = "We present an ultrabroadband thin-film infrared absorber made of sawtoothed anisotropic metamaterial. Absorptivity of higher than 95% at normal incidence is supported in a wide range of frequencies, where the full absorption width at half-maximum is about 86%. Such property is retained well at a very wide range of incident angles too. Light of shorter wavelengths are harvested at upper parts of the sawteeth of smaller widths, while light of longer wavelengths are trapped at lower parts of larger tooth widths. This phenomenon is explained by the slowlight modes in anisotropic metamaterial waveguide. Our study can be applied in the field of designing photovoltaic devices and thermal emitters.",

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AU - Cui, Yanxia

AU - Fung, Kin Hung

AU - Xu, Jun

AU - Ma, Hyungjin

AU - Jin, Yi

AU - He, Sailing

AU - Fang, Nicholas X.

PY - 2012/3/14

Y1 - 2012/3/14

N2 - We present an ultrabroadband thin-film infrared absorber made of sawtoothed anisotropic metamaterial. Absorptivity of higher than 95% at normal incidence is supported in a wide range of frequencies, where the full absorption width at half-maximum is about 86%. Such property is retained well at a very wide range of incident angles too. Light of shorter wavelengths are harvested at upper parts of the sawteeth of smaller widths, while light of longer wavelengths are trapped at lower parts of larger tooth widths. This phenomenon is explained by the slowlight modes in anisotropic metamaterial waveguide. Our study can be applied in the field of designing photovoltaic devices and thermal emitters.

AB - We present an ultrabroadband thin-film infrared absorber made of sawtoothed anisotropic metamaterial. Absorptivity of higher than 95% at normal incidence is supported in a wide range of frequencies, where the full absorption width at half-maximum is about 86%. Such property is retained well at a very wide range of incident angles too. Light of shorter wavelengths are harvested at upper parts of the sawteeth of smaller widths, while light of longer wavelengths are trapped at lower parts of larger tooth widths. This phenomenon is explained by the slowlight modes in anisotropic metamaterial waveguide. Our study can be applied in the field of designing photovoltaic devices and thermal emitters.

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KW - metamaterials

KW - Slow light

KW - thin film

KW - ultrabroadband

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Ultrabroadband light absorption by a sawtooth anisotropic metamaterial slab

Abstract

Keywords

ASJC Scopus subject areas

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