Investigation of terahertz waves propagating through far infrared/CO2 laser stealth-compatible coating based on one-dimensional photonic crystal
| Autor: | Chen Zongsheng, Wang Jiachun, Lei Miao, Qi-chao Wang, Zhi-gang Li, Jia-Ming Shi, Ji-Kui Zhang, Dapeng Zhao, Jie Zeng |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
business.industry Infrared Terahertz radiation 02 engineering and technology Molar absorptivity engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 010309 optics Optics Far infrared Coating 0103 physical sciences Transmittance engineering Optoelectronics Thin film 0210 nano-technology business Photonic crystal |
| Zdroj: | Infrared Physics & Technology. 79:144-150 |
| ISSN: | 1350-4495 |
| DOI: | 10.1016/j.infrared.2016.10.006 |
| Popis: | We propose a new method to disclose the camouflaged targets coated with far infrared/CO2 laser stealth-compatible coating by utilizing terahertz (THz) radar. A coating based on one-dimensional photonic crystal (1DPC) with a defect mode is specially designed and successfully prepared, which possesses a high reflectivity in 8–14 μm waveband and a low reflectivity at 10.6 μm, by alternating thin films of Ge, ZnSe and Si. The propagation characteristic of 0.3–2 THz wave at incident angle from 0° to 80° in such PC coating is investigated theoretically based on characteristic matrix method. The maximal transmittance is up to 92%, and the absorptivity keeps lower than 0.5% over the whole band. The results are verified by experiments, which demonstrate the feasibility of using THz radar to detect the targets covered with such stealth-compatible coatings. |
| Databáze: | OpenAIRE |
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