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5 October 2023 Tuning plasmonic coupling of nanocube dimers via nanoscale gap morphology
Yina Wu, Andrea Konečná, ShinHum Cho, Delia J. Milliron, Jordan A. Hachtel, F. Javier García de Abajo
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Proceedings Volume PC12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI; PC1264808 (2023) https://doi.org/10.1117/12.2676786
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
Fluorine-doped indium oxide (IO) nanocubes separated by nanometric gaps constitute a versatile system hosting high-quality mid-infrared plasmons with potential application in optoelectronics and light harvesting. In this theory-experiment combined work, we predict large tunability of these hybridized plasmon modes by controlling the gap size and the dimensionality of the gap region. We confirm this prediction through electron energy-loss spectroscopy (EELS) measurements performed in a scanning transmission electron microscope (STEM). Our theorical-experimental results elucidate the influence of gap geometry on the coupled plasmons and field concentration in doped IO nanostructures, and further suggest exciting applications in plasmonic sensing and surface-enhanced spectroscopies.
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Yina Wu, Andrea Konečná, ShinHum Cho, Delia J. Milliron, Jordan A. Hachtel, and F. Javier García de Abajo "Tuning plasmonic coupling of nanocube dimers via nanoscale gap morphology", Proc. SPIE PC12648, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XXI, PC1264808 (5 October 2023); https://doi.org/10.1117/12.2676786
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KEYWORDS
Plasmonics
Information operations
Plasmons
Spectroscopy
Nanoparticles
Nanostructures
Scanning transmission electron microscopy
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