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Proceedings Paper

Fast-responding mid-IR light emitter using suspended multilayer graphene
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Paper Abstract

Focusing on graphene’s high thermal conductivity and high emissivity, we developed a mid-IR light source using a suspended graphene structure as the light emitter. Compared to conventional mid-IR light emitters, this new source has approximately 1000x faster response time and 95% lower power consumption. In addition, it features high brightness and an emission spectrum similar to that of a black body. We used multilayer graphene deposited on Ni foil and transferred it onto a micro-trench etched into a Si/SiO2 wafer to create the suspended structure. The thermal insulation provided by this design allowed for heating of the free standing segment to temperatures over 1000 deg. C through electrical currents. Packaging the light emitter into a vacuum-sealed TO-5 metal can further improved the insulation and ensures a long lifetime for the graphene light emitter. These characteristics make the light source ideal for many analytical applications.

Paper Details

Date Published: 25 February 2020
PDF: 6 pages
Proc. SPIE 11302, Light-Emitting Devices, Materials, and Applications XXIV, 1130212 (25 February 2020); doi: 10.1117/12.2545039
Show Author Affiliations
Takaaki Nagata, Hamamatsu Photonics K.K. (Japan)
Takeo Fujii, Hamamatsu Photonics K.K. (Japan)
Tenkai Nakamura, Hamamatsu Photonics K.K. (Japan)
Tatsuaki Sasaki, Hamamatsu Photonics K.K. (Japan)
Yoshinobu Ito, Hamamatsu Photonics K.K. (Japan)
Motohiro Suyama, Hamamatsu Photonics K.K. (Japan)

Published in SPIE Proceedings Vol. 11302:
Light-Emitting Devices, Materials, and Applications XXIV
Jong Kyu Kim; Michael R. Krames; Martin Strassburg, Editor(s)

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