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20 August 2020 Insights from single particle spectroscopy of plasmonic nanostructures
Stephan Link, Behnaz Ostovar
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Proceedings Volume 11468, Enhanced Spectroscopies and Nanoimaging 2020; 114680X (2020) https://doi.org/10.1117/12.2567445
Event: SPIE Nanoscience + Engineering, 2020, Online Only
Abstract
A surface plasmon in a metal nanoparticle is the coherent oscillation of the conduction band electrons leading to both absorption and scattering as well as strong local electromagnetic fields. The plasmon is tunable through nanoparticel size and shape, as well as via nanoparticle interactions on different length scales that support near- and far-field coupling. Chemical synthesis and assembly of nanostructures are able to tailor plasmonic properties that are, however, typically broadened by ensemble averaging. Single particle spectroscopy together with correlated imaging is capable of removing heterogeneity in size, shape, and assembly geometry and furthermore allows one to separate absorption and scattering contributions. This talk describes how heterogeneity in crystal structure in a distribution of aluminum nanoparticles determines the damping of coherent lattice oscillations that are launched by ultrafast laser excitation.
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Stephan Link and Behnaz Ostovar "Insights from single particle spectroscopy of plasmonic nanostructures", Proc. SPIE 11468, Enhanced Spectroscopies and Nanoimaging 2020, 114680X (20 August 2020); https://doi.org/10.1117/12.2567445
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KEYWORDS
Plasmonics
Nanostructures
Particles
Spectroscopy
Nanoparticles
Absorption
Nanolithography
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