Journal
APPLIED PHYSICS EXPRESS
Volume 7, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.7567/APEX.7.012103
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Funding
- Core Research for Evolutional Science and Technology (CREST) from the Japan Science and Technology Agency (JST)
- Japan Society for the Promotion of Science (JSPS)
- Grants for Excellent Graduate Schools from the Ministry of Education, Culture, Sports, Science and Technology (MEXT)
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We experimentally demonstrate filter-free nondispersive infrared (NDIR) sensing of organic solvents using single-peak narrow-bandwidth mid-infrared thermal emitters. Our emitters are based on multiple quantum wells (MQWs) and two-dimensional (2D) photonic crystal (PC) slabs, and show a single thermal emission peak with a quality factor of over 100 at the fingerprint wavelength (around 9 pm) of the target organic solvents. Using these narrow-bandwidth thermal emitters and commercial pyroelectric sensors without any optical bandpass filters, we successfully distinguish and determine the concentration of the target solvents among other solvents. (C) 2014 The Japan Society of Applied Physics
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