Coupled kinetic Boltzmann electromagnetic approach for intense ultrashort laser excitation of plasmonic nanostructures

We propose a multiphysical computational approach that allows for efficient coupling of full-vector Maxwell-based propagation codes with kinetic Boltzmann equations to investigate the spatial dynamics of non-equilibrium processes in plasmonic nanostructures upon intense laser excitation. Accessing t...

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Bibliographic Details
Published in:Physical review. B 2021-07, Vol.104 (3), p.1, Article 035418
Main Authors: Rudenko, Anton, Moloney, Jerome V.
Format: Article
Language:English
Subjects:
Electron distribution
Electron emission
Electron transport
Energy distribution
Excitation
Nanoparticles
Nanostructure
Plasmonics
Propagation
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Summary:We propose a multiphysical computational approach that allows for efficient coupling of full-vector Maxwell-based propagation codes with kinetic Boltzmann equations to investigate the spatial dynamics of non-equilibrium processes in plasmonic nanostructures upon intense laser excitation. Accessing the energy-resolved electron distribution provides a direct path towards multidimensional modeling of transient optical, electron emission, and electron transport processes. Simulations are performed for a gold nanoparticle upon infrared ultrashort-pulse excitation close to the melting threshold, evidencing the interplay between strong intrinsic and (non)thermal nonlinearities and accessing simultaneously the non-equilibrium thermal and propagation dynamics. While delivering the results within a reasonable simulation time and while being open to further extensions, the proposed approach can serve as a reliable compromise between point quantum and space-dimensional classical models.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.104.035418