講演情報
[19p-A602-5]Infrared Plasmonic Metasurfaces with Double Resonances for SEIRA Platforms
〇(D)Tang Dang1, Shuting Ma1, Jiaqi Yang1, Hitoshi Tabata1, Hiroaki Matsui1 (1.Univ. of Tokyo)
キーワード：
surface-enhanced infrared absorptions、dual-resonant、metasurface
Recent progress in the design and manufacturing of metal nanostructures has opened up new possibilities for generating and controlling localized electromagnetic fields and adjustable spectral resonances. Notably, the recent introduction of multispectral plasmonic nanoantennas has demonstrated significant potential for various spectroscopic applications, such as on-chip plasmon sensing of multiple analytes, as well as simultaneous detection of fluorescence and Raman signals in both the visible and infrared (IR) spectral domains. Surface-enhanced infrared absorptions (SEIRAs) can identify molecules of different chemical nature by matching the plasmonic resonances with the molecular-vibrational peaks. However, the metasurfaces with a single resonance show a narrow resonance peak, which cannot detect excitation wavelengths for a wide range of molecular vibrations. Therefore, it is required to simultaneously measure different molecular vibrations. Our presentation introduces IR metasurfaces with dual resonances consisting of two different sizes, enabling comprehensive measurements of molecular vibrations beyond conventional SEIRA devices with single resonance.