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4 October 2022 Metamaterial absorber and reflector for ultra-sensitive infrared spectroscopy (Conference Presentation)
Takuo Tanaka
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Proceedings Volume PC12203, Enhanced Spectroscopies and Nanoimaging 2022; PC122030G (2022) https://doi.org/10.1117/12.2634141
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States
Abstract
We discuss about ultra-sensitive infrared spectroscopic techniques enhanced by metamaterials. To suppress unwanted background and noises in IR spectroscopy, metamaterial absorber with three-dimensional vertical-oriented metal-insulator-metal (v-MIM) structure was introduced. Owing to small footprint of v-MIM, the density of hot spots was dramatically increased resulting in strong signal enhancement and efficient suppression of background light. Using this device, 20 ppm concentration of carbon dioxide and butane molecules were detected. In addition, metamaterial reflector made of all dielectric structure were also investigated. The dielectric metasurfaces consisting of silicon microdisk arrays were designed and fabricated, realizing perfect reflection at certain mid-infrared wavelengths.
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Takuo Tanaka "Metamaterial absorber and reflector for ultra-sensitive infrared spectroscopy (Conference Presentation)", Proc. SPIE PC12203, Enhanced Spectroscopies and Nanoimaging 2022, PC122030G (4 October 2022); https://doi.org/10.1117/12.2634141
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KEYWORDS
Infrared spectroscopy
Metamaterials
Reflectors
Dielectrics
Infrared radiation
Molecules
Silicon
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