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Sensors 2015, 15(6), 13660-13669;

Detection Wavelength Control of Uncooled Infrared Sensors Using Two-Dimensional Lattice Plasmonic Absorbers

College of Science and Engineering, Ritsumeikan University, 1-1-1 Noji-Higashi, Kusatsu, Shiga 525-8577, Japan
Advanced Technology R&D Center, Mitsubishi Electric Corporation, 8-1-1 Tsukaguchi-Honmachi, Amagasaki, Hyogo 661-8661, Japan
This paper is extended version of the following conference paper: Ogawa, S.; Komoda, J.; Masuda, K.; Takagawa, Y.; Kimata, M. Wavelength selective uncooled infrared sensor using triangular-lattice plasmonic absorbers. In Proceedings of the International Conference on Optical MEMS and Nanophotonics (OMN), Kanazawa, Japan, 18–22 August 2013; pp. 61–62.
Authors to whom correspondence should be addressed.
Academic Editor: Yoshiteru Ishida
Received: 19 March 2015 / Accepted: 3 June 2015 / Published: 10 June 2015
(This article belongs to the Special Issue State-of-the-Art Sensors Technology in Japan 2015)
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Wavelength-selective uncooled infrared (IR) sensors are highly promising for a wide range of applications, such as fire detection, gas analysis and biomedical analysis. We have recently developed wavelength-selective uncooled IR sensors using square lattice two-dimensional plasmonic absorbers (2-D PLAs). The PLAs consist of a periodic 2-D lattice of Au-based dimples, which allow photons to be manipulated using surface plasmon modes. In the present study, a detailed investigation into control of the detection wavelength was conducted by varying the PLA lattice structure. A comparison was made between wavelength-selective uncooled IR sensors with triangular and square PLA lattices that were fabricated using complementary metal oxide semiconductor and micromachining techniques. Selective enhancement of the responsivity could be achieved, and the detection wavelength for the triangular lattice was shorter than that for the square lattice. The results indicate that the detection wavelength is determined by the reciprocal-lattice vector for the PLAs. The ability to control the detection wavelength in this manner enables the application of such PLAs to many types of thermal IR sensors. The results obtained here represent an important step towards multi-color imaging in the IR region. View Full-Text
Keywords: uncooled infrared sensors; plasmonics; metamaterial; wavelength-selective uncooled infrared sensors; plasmonics; metamaterial; wavelength-selective

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Takagawa, Y.; Ogawa, S.; Kimata, M. Detection Wavelength Control of Uncooled Infrared Sensors Using Two-Dimensional Lattice Plasmonic Absorbers. Sensors 2015, 15, 13660-13669.

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