Tracking Optical Welding through Groove Modes in Plasmonic Nanocavities
作者： J. Mertens , A. Demetriadou , R. W. Bowman , F. Benz , M.-E. Kleemann
DOI: 10.1021/ACS.NANOLETT.6B02164
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摘要: We report the light-induced formation of conductive links across nanometer-wide insulating gaps. These are realized by incorporating spacers molecules or 2D monolayers inside a gold plasmonic nanoparticle-on-mirror (NPoM) geometry. Laser irradiation individual NPoMs controllably reshapes and tunes system, in some cases forming bridges between particle substrate, which shorts gaps geometrically electronically. Dark-field spectroscopy monitors bridge situ, revealing strong mode mixing dominated clear anticrossings. Finite difference time domain simulations confirm this spectral evolution, gives insights into metal filament formation. A simple analytic cavity model describes observed hybridization tightly confined modes radiative antenna sustained NPoM. Our results show how optics can reveal properties electrical transport well...
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