Highly efficient and broadband mid-infrared metamaterial thermal emitter for optical gas sensing

Yongkang Gong, Zuobin Wang, Kang Li, Leshan Uggalla, Jungang Huang, Nigel Copner, Yang Zhou, Dun Qiao, Jiuyuan Zhu

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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 ∼0.94 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.

Original languageEnglish
Pages (from-to)4537-4540
Number of pages4
JournalOptics Letters
Volume42
Issue number21
DOIs
Publication statusPublished - 31 Oct 2017

Keywords

  • Optical gas sensing
  • thermal light source
  • broadband mid-infrared metamaterial thermal emitter

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