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

Takaaki Nagata; Takeo Fujii; Tenkai Nakamura; Tatsuaki Sasaki; Yoshinobu Ito; Motohiro Suyama

doi:10.1117/12.2545039

25 February 2020 Fast-responding mid-IR light emitter using suspended multilayer graphene

Takaaki Nagata, Takeo Fujii, Tenkai Nakamura, Tatsuaki Sasaki, Yoshinobu Ito, Motohiro Suyama

Proceedings Volume 11302, Light-Emitting Devices, Materials, and Applications XXIV; 1130212 (2020) https://doi.org/10.1117/12.2545039
Event: SPIE OPTO, 2020, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Takaaki Nagata, Takeo Fujii, Tenkai Nakamura, Tatsuaki Sasaki, Yoshinobu Ito, and Motohiro Suyama "Fast-responding mid-IR light emitter using suspended multilayer graphene", Proc. SPIE 11302, Light-Emitting Devices, Materials, and Applications XXIV, 1130212 (25 February 2020); https://doi.org/10.1117/12.2545039

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