Highly efficient and broadband mid-infrared metamaterial thermal emitter for optical gas sensing.
Opt Lett
; 42(21): 4537-4540, 2017 Nov 01.
Article
en En
| MEDLINE
| ID: mdl-29088207
ABSTRACT
Development of a novel, cost-effective, and highly efficient mid-infrared light source has been identified as a major scientific and technological goal within the area of optical gas sensing. We have proposed and investigated a mid-infrared metamaterial thermal emitter based on micro-structured chromium thin film. The results demonstrate that the proposed thermal light source supports broadband and wide angular absorption of both TE- and TM-polarized light, giving rise to broadband thermal radiation with averaged emissivity of â¼0.94 in a mid-infrared atmospheric window of 8-14 µm. The proposed microphotonic concept provides a promising alternative mid-infrared source and paves the way towards novel optical gas sensing platforms for many applications.
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Opt Lett
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2017
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Article