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Electric-field-resolved detection of localized surface plasmons at petahertz-scale frequencies

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posted on 2023-12-21, 17:00 authored by Dmitry A. Zimin, Ihor Cherniukh, Simon C. Böhme, Gabriele Rainò, Maksym V. Kovalenko, Hans Jakob Wörner
We present a novel electric-field-resolved approach for probing ultrafast dynamics of localized surface plasmons in metallic nanoparticles. The electric field of the broadband carrier-envelope-phase stable few-cycle light pulse employed in the experiment provides access to time-domain signatures of plasmonic dynamics that are imprinted on the pulse waveform. The simultaneous access to absolute spectral amplitudes and phases of the interacting light allows us obtaining a complex spectral response associated with localized surface plasmons. We benchmark our findings against the absorbance spectrum obtained with a spectrometer as well as the extinction cross-section modeled by a classical Mie scattering theory.

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