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31 December 2022 Visualizing enhanced optical fields of dielectric-based metamaterials by mid-infrared photothermal microscopy
Ryo Kato, Taka-aki Yano, Takuo Tanaka
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Proceedings Volume PC12322, Nanophotonics, Micro/Nano Optics, and Plasmonics VIII; PC123220F (2022) https://doi.org/10.1117/12.2649358
Event: SPIE/COS Photonics Asia, 2022, Online Only
Abstract
Visualization of enhanced optical fields in metallic and dielectric nanostructures resonated with infrared light is fundamentally important to control optical properties of metamaterials. However, conventional optical microscopic techniques, such as Fourier Transform Infrared absorption spectroscopy cannot resolve optically induced light fields of dielectric structures because of their low spatial resolution due to the diffraction limit of the infrared light. We introduced super-resolution far-field infrared spectroscopy to visualize the distribution of optical fields of dielectric-based metamaterials in the infrared region. Our newly developed novel infrared spectroscopic technique called as mid-infrared photothermal microscopy demonstrates to investigate optical field properties of silicon-based metamaterials at the sub-micrometer scale, which is far-beyond the diffraction limit of the infrared light.
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Ryo Kato, Taka-aki Yano, and Takuo Tanaka "Visualizing enhanced optical fields of dielectric-based metamaterials by mid-infrared photothermal microscopy", Proc. SPIE PC12322, Nanophotonics, Micro/Nano Optics, and Plasmonics VIII, PC123220F (31 December 2022); https://doi.org/10.1117/12.2649358
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KEYWORDS
Metamaterials
Infrared spectroscopy
Infrared radiation
Microscopy
Mid-IR
Visualization
Visual optics
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