Ultrabroadband light absorption by a sawtooth anisotropic metamaterial slab
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 ver...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | en_US |
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American Chemical Society (ACS)
2013
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| Online Access: | http://hdl.handle.net/1721.1/78347 https://orcid.org/0000-0003-0501-8843 https://orcid.org/0000-0001-5713-629X |
| _version_ | 1811089116634284032 |
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| author | Cui, Yanxia Fung, Kin Hung Xu, Jun Ma, Hyungjin Jin, Yi He, Sailing Fang, Nicholas Xuanlai |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Cui, Yanxia Fung, Kin Hung Xu, Jun Ma, Hyungjin Jin, Yi He, Sailing Fang, Nicholas Xuanlai |
| author_sort | Cui, Yanxia |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T14:13:57Z |
| format | Article |
| id | mit-1721.1/78347 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:13:57Z |
| publishDate | 2013 |
| publisher | American Chemical Society (ACS) |
| record_format | dspace |
| spelling | mit-1721.1/783472022-10-01T19:55:07Z Ultrabroadband light absorption by a sawtooth anisotropic metamaterial slab Cui, Yanxia Fung, Kin Hung Xu, Jun Ma, Hyungjin Jin, Yi He, Sailing Fang, Nicholas Xuanlai Massachusetts Institute of Technology. Department of Mechanical Engineering Fung, Kin Hung Xu, Jun Fang, Nicholas Xuanlai 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. National Science Foundation (U.S.) (CMMI 0846771) National Natural Science Foundation (China) (60990320) National Natural Science Foundation (China) (60901039) 2013-04-11T16:19:00Z 2013-04-11T16:19:00Z 2012-02 2012-01 Article http://purl.org/eprint/type/JournalArticle 1530-6984 1530-6992 http://hdl.handle.net/1721.1/78347 Cui, Yanxia et al. “Ultrabroadband Light Absorption by a Sawtooth Anisotropic Metamaterial Slab.” Nano Letters 12.3 (2012): 1443–1447. https://orcid.org/0000-0003-0501-8843 https://orcid.org/0000-0001-5713-629X en_US http://dx.doi.org/10.1021/nl204118h Nano Letters Creative Commons Attribution-Noncommercial-Share Alike 3.0 http://creativecommons.org/licenses/by-nc-sa/3.0/ application/pdf American Chemical Society (ACS) arXiv |
| spellingShingle | Cui, Yanxia Fung, Kin Hung Xu, Jun Ma, Hyungjin Jin, Yi He, Sailing Fang, Nicholas Xuanlai Ultrabroadband light absorption by a sawtooth anisotropic metamaterial slab |
| title | Ultrabroadband light absorption by a sawtooth anisotropic metamaterial slab |
| title_full | Ultrabroadband light absorption by a sawtooth anisotropic metamaterial slab |
| title_fullStr | Ultrabroadband light absorption by a sawtooth anisotropic metamaterial slab |
| title_full_unstemmed | Ultrabroadband light absorption by a sawtooth anisotropic metamaterial slab |
| title_short | Ultrabroadband light absorption by a sawtooth anisotropic metamaterial slab |
| title_sort | ultrabroadband light absorption by a sawtooth anisotropic metamaterial slab |
| url | http://hdl.handle.net/1721.1/78347 https://orcid.org/0000-0003-0501-8843 https://orcid.org/0000-0001-5713-629X |
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