VO2 thermochromic metamaterial-based smart optical solar reflector
| Autor: | C.H. de Groot, Kai Sun, Mirko Simeoni, Brian Bilenberg, Sandro Mengali, Otto L. Muskens, Alessandro Urbani, Maksim Zalkovskij, Christoph A. Riedel |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Thermochromism Phase transition Materials science Spacecraft Radiative cooling business.industry Metamaterial Physics::Optics Reflector (antenna) 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials 0103 physical sciences Optoelectronics Thermal emittance Electrical and Electronic Engineering 0210 nano-technology business Plasmon Biotechnology |
| Popis: | Optical solar reflector smart radiators are able to control the temperature of spacecraft. This work demonstrates a novel smart optical solar reflector using a patterned thermo-chromic VO2 plasmonic meta-surface design. The VO2 meta-surface combines the temperature induced phase transition of VO2 with plasmonic resonances resulting in a significant enhancement of the infrared absorption. The enhanced absorption obtained at a reduced VO2 coverage results in superior emittance tunability Δe and lower solar absorptance α compared to a corresponding thin-film reflector. An emittance tunability of 0.48 is obtained for the meta-reflector design, representing a 30% improvement compared to the unstructured film. Meta-surface based smart optical solar reflectors offer a new route toward energy-efficient and cost-effective passive thermal control systems of spacecraft and other surfaces. |
| Databáze: | OpenAIRE |
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