Selective thermal emission and infrared camouflage based on layered media |
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Institution: | 1. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150001, China;2. Institute FEMTO-ST, CNRS, University Bourgogne Franche-Comté, Besançon 25000, France;3. Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China;4. Department of Physics, University of Ottawa, Ottawa, K1N 6N5, Canada;5. Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, Karlsruhe D-76131, Germany |
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Abstract: | Infrared camouflage based on artificial thermal metasurfaces has recently attracted significant attention. By eliminating thermal radiation differences between the object and the background, it is possible to hide a given object from infrared detection. Infrared camouflage is an important element that increases the survivability of aircraft and missiles, by reducing target susceptibility to infrared guided threats. Herein, a simple and practicable design is theoretically presented based on a multilayer film for infrared stealth, with distinctive advantages of scalability, flexible fabrication, and structural simplicity. The multilayer medium consists of silicon substrate, carbon layer and zinc sulfide film, the optical properties of which are determined by transfer matrix method. By locally changing the thickness of the coating film, the spatial tunability and continuity in thermal emission are demonstrated. A continuous change of emissive power is further obtained and consequently implemented to achieve thermal camouflage functionality. In addition, other functionalities, like thermal illusion and thermal coding, are demonstrated by thickness-engineered multilayer films. |
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Keywords: | Heat transfer manipulation Infrared camouflage Multilayer media Selective thermal emission Thermal illusion Transfer matrix method |
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