Record #243778 - GSI Repository

PLASMMONS

Plasmons and Mechanical Motions at the Nano-Scale Investigated with Frequency-Domain Experiments and Simulations

Grant period	2020-11-01 - 2022-10-31
Funding body	European Union
Call number	H2020-WF-02-2019
Grant number	101003436
Identifier	G:(EU-Grant)101003436

Note: Plasmons are oscillations of charge carriers in metallic nanoparticles that confine light in the nanometer length-scale. Translationally symmetric arrays of metallic nanoparticles, termed Plasmonic Super-Crystals (PSCs), can become an integral part of augmented light-harvesting technologies, like plasmonic solar cells and photocatalysts. A current limitation is that plasmons are fragile, short-living excitations, which are highly sensitive to the exact arrangement of matter at the nanoscale. The structural stability of PSCs is prone to multifarious nanomechanical motions such as nanoparticle-vibrations, colloidal phonons, and surface waves on the substrate. With this project, I aim to elucidate the role of nanomechanical motions on the plasmonic properties of PSCs. To achieve this goal I will employ White Light Absorption (WLA) to study plasmonic resonances and Brillouin Light Scattering (BLS) to study mechanical resonances. Plasmonically-enhanced BLS and spectroscopic investigation of plasmons in vibrationally-excited PSCs, will be used to reveal cross-talking between the two subsystems. A momentum-resolved view of vibrational waves will be acquired with angle-resolved BLS. The experimental results will be interpreted based on frequency-domain, finite-element simulations of plasmomechanical coupling phenomena. With this approach, I intend to adopt the concept of microscopic couplings from condensed-matter Physics, to a metamaterial and determine the fundamental excitations and interactions of these artificial structures. Understanding the interplay between plasmonic and structural degrees of freedom in PSCs is expected to pave the way for their use in plasmomechanical devices.

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Record created 2021-10-10, last modified 2023-02-14

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