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Ultra-thin and near-unity selective emitter for efficient cooling

Authors
Kim, Do HyeonLee, Gil JuHeo, Se-YeonSon, SoominKang, Kyeong MukLee, HeonSong, Young Min
Issue Date
27-9월-2021
Publisher
OPTICAL SOC AMER
Citation
OPTICS EXPRESS, v.29, no.20, pp.31364 - 31375
Indexed
SCIE
SCOPUS
Journal Title
OPTICS EXPRESS
Volume
29
Number
20
Start Page
31364
End Page
31375
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/136302
DOI
10.1364/OE.438662
ISSN
1094-4087
Abstract
For the efficient radiative cooling of objects, coolers should emit heat within atmospheric transparent window and block heat absorption from the surrounding environments. Thus, selective emitters enable highly efficient cooling via engineered photonic structures such as metamaterials and multi-stacking structures. However, these structures require sophisticated fabrication processes and large quantities of materials, which can restrict mass-production. This study introduces an ultra-thin (similar to 1 ism) and near-unity selective emitter (UNSE) within the atmospheric window, which can be fabricated using simple and affordable process. The combination of infrared (IR) lossy layers and high index lossless layer enhances the resonance in the structure thus, the emissivity in long wavelength IR region increases to near-unity within a thickness of similar to 1 mu m. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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공과대학 (신소재공학부)
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