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Microemitter-Based IR Spectroscopy and Imaging with Multilayer Graphene Thermal Emission
Kenta Nakagawa1,2, Yui Shimura1, Yusuke Fukazawa1
1Department of Applied Physics and Physico-Informatics, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan.
Nano Letters
|April 18, 2022
Summary
This study introduces advanced infrared (IR) spectroscopy and imaging using multilayer-graphene microemitters. These novel emitters offer faster speeds and smaller footprints, overcoming limitations of traditional Fourier transform infrared spectroscopy (FTIR).
Area of Science:
- Spectroscopy
- Materials Science
- Nanotechnology
Background:
- Fourier transform infrared spectroscopy (FTIR) is a valuable analytical technique.
- Traditional FTIR systems face limitations in speed, size, and light source design.
Purpose of the Study:
- To develop a novel infrared spectroscopy and imaging system.
- To overcome the performance limitations of conventional FTIR.
Main Methods:
- Utilized multilayer-graphene microemitters as infrared light sources.
- Developed a new IR analysis system incorporating these microemitters.
- Performed IR absorption spectroscopy and 2D IR chemical imaging.
Main Results:
- Graphene microemitters exhibit high modulation speed (>50 kHz) and small footprint (sub-μm²).
- Achieved high-spatial-resolution IR imaging with resolution around 1 μm.
- Demonstrated 2D IR chemical imaging to visualize chemical distribution.
Conclusions:
- Graphene-based IR technology offers significant advantages over traditional FTIR.
- This advancement can expand applications in chemistry, materials science, medicine, and beyond.
