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Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
Published on: September 27, 2011
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Harnessing collisional nonlinearity for enhanced harmonic generation by ultraviolet plasmonic nanoparticles
Matteo Silvestri1, Matteo Venturi1, Mattia Di Muzio1
1Department of Physical and Chemical Sciences, University of L'Aquila, Via Vetoio, 67100 L'Aquila, Italy.
The Journal of Chemical Physics
|August 2, 2024
Summary
Inelastic electron collisions significantly boost nonlinear harmonic generation in ultraviolet plasmonic nanoparticles. Poor metals like sodium and aluminum show promise for efficient extreme ultraviolet nano-sources.
Area of Science:
- Condensed Matter Physics
- Plasmonics
- Quantum Optics
Background:
- Nonlinear (NL) dynamics in plasmonic nanoparticles are crucial for advanced light generation.
- Inelastic electron collisions play a significant role in these NL processes.
- Localized surface plasmons (LSPs) in nanoparticles enhance light-matter interactions.
Purpose of the Study:
- To investigate the contribution of inelastic electron collisions to NL dynamics in UV plasmonic nanoparticles.
- To explore the potential of these nanoparticles for harmonic generation, particularly extreme ultraviolet (XUV) generation.
- To model and demonstrate efficient XUV generation using plasmonic nanospheres made of poor metals.
Main Methods:
- Utilized the Landau weak coupling formalism to model electron dynamics.
- Incorporated electron-electron and electron-phonon scattering using hydrodynamic equations.
- Solved equations perturbatively to determine third-order NL susceptibilities.
- Modeled high harmonic generation (HHG) enhanced by LSPs in nanospheres.
Main Results:
- Demonstrated efficient high harmonic generation in nanospheres composed of sodium and aluminum.
- Observed significant field intensity enhancement (≃103-105) in these plasmonic nanospheres.
- Confirmed the crucial role of inelastic electron collisions in boosting harmonic generation.
Conclusions:
- Poor metals, specifically sodium and aluminum, are highly promising for advanced XUV nano-sources.
- Plasmonic nanoparticles offer efficient platforms for enhancing harmonic generation.
- These findings have potential applications in nano-spectroscopy and other nanoscale optical technologies.
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