Engineering the Complex-Valued Constitutive Parameters of Metamaterials for Perfect Absorption
Abstract We theoretically studied how to directly engineer the constitutive parameters of metamaterials for perfect absorbers of electromagnetic waves. As an example, we numerically investigated the necessary refractive index n and extinction coefficient k and the relative permittivity ε and permeab...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2017-04-01
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| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s11671-017-2048-2 |
| _version_ | 1797759966704041984 |
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| author | Pengwei Wang Naibo Chen Chaojun Tang Jing Chen Fanxin Liu Saiqian Sheng Bo Yan Chenghua Sui |
| author_facet | Pengwei Wang Naibo Chen Chaojun Tang Jing Chen Fanxin Liu Saiqian Sheng Bo Yan Chenghua Sui |
| author_sort | Pengwei Wang |
| collection | DOAJ |
| description | Abstract We theoretically studied how to directly engineer the constitutive parameters of metamaterials for perfect absorbers of electromagnetic waves. As an example, we numerically investigated the necessary refractive index n and extinction coefficient k and the relative permittivity ε and permeability μ of a metamaterial anti-reflection layer, which could cancel the reflection from a hydrogenated amorphous silicon (α-Si:H) thin film on a metal substrate, within the visible wavelength range from 300 to 800 nm. We found that the metamaterial anti-reflection layer should have a negative refractive index (n < 0) for short-wavelength visible light but have a positive refractive index (n > 0) for long-wavelength visible light. The relative permittivity ε and permeability μ could be fitted by the Lorentz model, which exhibited electric and magnetic resonances, respectively. |
| first_indexed | 2024-03-12T18:52:05Z |
| format | Article |
| id | doaj.art-ebdade09256a4cac8dd2009440d7d4f6 |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T18:52:05Z |
| publishDate | 2017-04-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-ebdade09256a4cac8dd2009440d7d4f62023-08-02T07:12:12ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2017-04-011211610.1186/s11671-017-2048-2Engineering the Complex-Valued Constitutive Parameters of Metamaterials for Perfect AbsorptionPengwei Wang0Naibo Chen1Chaojun Tang2Jing Chen3Fanxin Liu4Saiqian Sheng5Bo Yan6Chenghua Sui7Center for Optics & Optoelectronics Research, Department of Applied Physics, Zhejiang University of TechnologyCenter for Optics & Optoelectronics Research, Department of Applied Physics, Zhejiang University of TechnologyCenter for Optics & Optoelectronics Research, Department of Applied Physics, Zhejiang University of TechnologyCollege of Electronic Science and Engineering, Nanjing University of Posts and TelecommunicationsCenter for Optics & Optoelectronics Research, Department of Applied Physics, Zhejiang University of TechnologyCenter for Optics & Optoelectronics Research, Department of Applied Physics, Zhejiang University of TechnologyCenter for Optics & Optoelectronics Research, Department of Applied Physics, Zhejiang University of TechnologyCenter for Optics & Optoelectronics Research, Department of Applied Physics, Zhejiang University of TechnologyAbstract We theoretically studied how to directly engineer the constitutive parameters of metamaterials for perfect absorbers of electromagnetic waves. As an example, we numerically investigated the necessary refractive index n and extinction coefficient k and the relative permittivity ε and permeability μ of a metamaterial anti-reflection layer, which could cancel the reflection from a hydrogenated amorphous silicon (α-Si:H) thin film on a metal substrate, within the visible wavelength range from 300 to 800 nm. We found that the metamaterial anti-reflection layer should have a negative refractive index (n < 0) for short-wavelength visible light but have a positive refractive index (n > 0) for long-wavelength visible light. The relative permittivity ε and permeability μ could be fitted by the Lorentz model, which exhibited electric and magnetic resonances, respectively.http://link.springer.com/article/10.1186/s11671-017-2048-2MetamaterialsPerfect absorbersAnti-reflection coatingLight harvesting |
| spellingShingle | Pengwei Wang Naibo Chen Chaojun Tang Jing Chen Fanxin Liu Saiqian Sheng Bo Yan Chenghua Sui Engineering the Complex-Valued Constitutive Parameters of Metamaterials for Perfect Absorption Nanoscale Research Letters Metamaterials Perfect absorbers Anti-reflection coating Light harvesting |
| title | Engineering the Complex-Valued Constitutive Parameters of Metamaterials for Perfect Absorption |
| title_full | Engineering the Complex-Valued Constitutive Parameters of Metamaterials for Perfect Absorption |
| title_fullStr | Engineering the Complex-Valued Constitutive Parameters of Metamaterials for Perfect Absorption |
| title_full_unstemmed | Engineering the Complex-Valued Constitutive Parameters of Metamaterials for Perfect Absorption |
| title_short | Engineering the Complex-Valued Constitutive Parameters of Metamaterials for Perfect Absorption |
| title_sort | engineering the complex valued constitutive parameters of metamaterials for perfect absorption |
| topic | Metamaterials Perfect absorbers Anti-reflection coating Light harvesting |
| url | http://link.springer.com/article/10.1186/s11671-017-2048-2 |
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