Electromechanically Rotatable Cross-Shaped Mid-IR Metamaterial
| Autor: | Yu-Sheng Lin, Jitong Zhong |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
IR filter
Materials science Infrared Astrophysics::High Energy Astrophysical Phenomena General Chemical Engineering Physics::Optics 02 engineering and technology 01 natural sciences Inorganic Chemistry Narrowband 0103 physical sciences Broadband lcsh:QD901-999 General Materials Science Infrared cut-off filter 010302 applied physics business.industry Resonance Metamaterial multi-functionalities 021001 nanoscience & nanotechnology Condensed Matter Physics Aspect ratio (image) rotatability electromechanically Wavelength metamaterials Optoelectronics lcsh:Crystallography 0210 nano-technology business |
| Zdroj: | Crystals Volume 10 Issue 6 Crystals, Vol 10, Iss 431, p 431 (2020) |
| ISSN: | 2073-4352 |
| DOI: | 10.3390/cryst10060431 |
| Popis: | We present an electromechanically rotatable infrared (IR) cross-shaped metamaterial (CSM) in the mid-IR wavelength range. The CSM configuration is composed of double gold layers with cross-shaped nanostructures. To investigate the fano-resonance within CSM nanostructures, the aspect ratios and length ratios of CSM are compared and discussed. The electromagnetic responses exhibit the characteristics of large tuning range, tunable broad and narrow bandwidths. By properly tailoring the aspect ratio of CSM, the resonance can be tuned with bidirectional tuning in the range of 650 nm. CSM with different length ratios exhibit narrowband resonances around the wavelength of 4.6 &mu m and broadband resonances in the wavelength range of 5.0 &mu m to 6.5 &mu m. These characteristics of CSM with different aspect ratios and length ratios could be potentially used in IR narrowband and broadband filter. To further increase the flexibility of proposed electromechanically rotatable CSM, an actively tunable narrowband and broadband filter in the mid-IR wavelength range is performed. This study provides a unique approach to realizing an IR filter, with high flexibility. |
| Databáze: | OpenAIRE |
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