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Metal‐Loaded Dielectric Resonator Metasurfaces for Radiative Cooling

Open access
Zou, Chengjun, Ren, Guanghui, Hossain, Md Muntasir, Nirantar, Shruti, Withayachumnankul, Withawat, Ahmed, Taimur, Bhaskaran, Madhu, Sriram, Sharath, Gu, Min, Fumeaux, Christophe·2017·Advanced Optical Materials

Abstract

Tailoring emissivity and absorptivity of structured material surfaces to match atmospheric transmission spectral windows can lead to radiative cooling that consumes no external energy. Recent advances in nanofabrication technology have facilitated progress in the realization of structured metasurfaces. In particular, subwavelength dielectric resonator metasurface supporting various resonance modes can be efficient absorbers. Here, such metasurfaces are proposed and experimentally demonstrated enhanced by metal loading to obtain strong broadband thermal emission over a wide angle at mid‐infrared frequencies. This concept results in passive cooling devices that can lower temperature by 10 °C below ambient temperature. Importantly, the utilization of standard constituent materials and processes lead to scalable fabrication compatible with silicon photonics integration, which will enable effective and energy‐efficient applications in passive cooling and thermodynamic control.

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Authors
Zou, C., Ren, G., Hossain, M. M., Nirantar, S., Withayachumnankul, W., Ahmed, T., Bhaskaran, M., Sriram, S., Gu, M., & Fumeaux, C.
Venue
Advanced Optical Materials
Publisher
Wiley
Published
2017-08-11
Volume
5
Issue
20
ISSN
2195-1071 (ISSN-L)
OpenAlex
W2742312981
Cited by
313
References
0
FWCI
15.98
Type
journal article
Language
en
Open access
green

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