期刊
ACS PHOTONICS
卷 5, 期 6, 页码 2280-2286出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.8b00119
关键词
plasmonics; optical solar reflectors; thermochromic materials; vanadium dioxide; radiative cooling meta-surfaces; perfect absorption
类别
资金
- European Union's Horizon 2020 research and innovation programme [687303]
- EPSRC [EP/J016918/1]
- EPSRC [EP/J011797/1, EP/M009122/1] Funding Source: UKRI
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 As and lower solar absorptance a 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.
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