Elimination of unwanted modes in wavelength-selective uncooled infrared sensors using plasmonic metamaterial absorbers

Shinpei Ogawa; Yousuke Takagawa; Masafumi Kimata

doi:10.1117/12.2518563

9 May 2019 Elimination of unwanted modes in wavelength-selective uncooled infrared sensors using plasmonic metamaterial absorbers

Shinpei Ogawa, Yousuke Takagawa, Masafumi Kimata

Author Affiliations +

Proceedings Volume 11002, Infrared Technology and Applications XLV; 110021K (2019) https://doi.org/10.1117/12.2518563
Event: SPIE Defense + Commercial Sensing, 2019, Baltimore, MD, United States

Abstract

Wavelength-selective uncooled infrared (IR) sensors have significant advantages for applications such as fire detection, gas analysis, hazardous material recognition, and biological analysis. We have demonstrated a wavelength-selective uncooled IR sensor with a plasmonic metamaterial absorber (PMA). However, unwanted modes are a serious issue for wavelength-selective detection and are attributed to the absorption by the materials used in the sensors that do not consist of PMAs. Elimination of unwanted modes in a wavelength-selective uncooled IR sensor with a PMA is demonstrated using a subtraction operation with a reference pixel. The reference pixel has the same sensor structure, except for the absorber area; a flat mirror was instead formed on the absorber surface. Wavelength-selective uncooled IR sensors were fabricated with PMAs and the reference pixels. Single-mode detection was achieved by the subtraction operation with the reference pixel.

Citation Download Citation

Shinpei Ogawa, Yousuke Takagawa, and Masafumi Kimata "Elimination of unwanted modes in wavelength-selective uncooled infrared sensors using plasmonic metamaterial absorbers", Proc. SPIE 11002, Infrared Technology and Applications XLV, 110021K (9 May 2019); https://doi.org/10.1117/12.2518563

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