Broadband THz Absorption of Microbolometer Array Integrated with Split-Ring Resonators
| Autor: | Xie Zheyuan, Fan Shuming, Niu Qingchen, Jun Wang, Jun Gou |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Terahertz radiation Physics::Optics Nanochemistry Broadband 02 engineering and technology Absorption Split-ring resonator Resonator 020210 optoelectronics & photonics lcsh:TA401-492 0202 electrical engineering electronic engineering information engineering Thz General Materials Science Absorption (electromagnetic radiation) Coupling Nano Express business.industry Split-ring Microbolometer 021001 nanoscience & nanotechnology Condensed Matter Physics Optoelectronics lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology business |
| Zdroj: | Nanoscale Research Letters, Vol 15, Iss 1, Pp 1-7 (2020) Nanoscale Research Letters |
| ISSN: | 1556-276X |
| DOI: | 10.1186/s11671-020-03454-2 |
| Popis: | In this paper, a periodic structure based on metallic split-ring resonators is integrated into micro-bridge structures of THz microbolometer array to achieve high THz wave absorption in a wide frequency range. With a small unit size of 35 μm × 35 μm, the effect of split-ring structure on THz wave absorption characteristics of the multilayer structure array is studied to manipulate the resonance absorption frequencies. The absorption bandwidth is effectively increased by integrating a combined structure of split-ring and metallic disk. Broadband THz absorption is formed by coupling the absorption peaks of different structures. The periodic structure of dual-ring combined with a metallic disk provides a broadband THz wave absorption in the range of 4–7 THz. The highest absorption in the band reaches 90% and the lowest absorption is higher than 40%. The designed structure is process-compatible and easy to implement for small-pixel THz microbolometers with high absorption in a wide spectrum range. The research provides a scheme for broadband THz sensing and real-time imaging at room temperature. |
| Databáze: | OpenAIRE |
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