The role of morphology and coupling of gold nanoparticles in optical breakdown during picosecond pulse exposures

This paper presents a theoretical study of the interaction of a 6 ps laser pulse with uncoupled and plasmon-coupled gold nanoparticles. We show how the one-dimensional assembly of particles affects the optical breakdown threshold of its surroundings. For this purpose we used a fully coupled electrom...

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Bibliographic Details
Published in:Beilstein journal of nanotechnology 2016, Vol.7 (1), p.869-880
Main Authors: Davletshin, Yevgeniy R, Kumaradas, J Carl
Format: Article
Language:English
Subjects:
Absorption cross sections
Aspect ratio
Breakdown
Design of experiments
Dimers
Electric fields
Electromagnetism
electron plasma
Energy
Finite element method
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Gold
Lasers
Morphology
Nanoparticles
Nanorods
Nanoscience
Nanospheres
Nanotechnology
optical breakdown
Optical properties
Photonics
Picosecond pulses
Plasma
Plasma dynamics
plasmon coupling
plasmonic nanoparticles
Thresholds
Trimers
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Summary:This paper presents a theoretical study of the interaction of a 6 ps laser pulse with uncoupled and plasmon-coupled gold nanoparticles. We show how the one-dimensional assembly of particles affects the optical breakdown threshold of its surroundings. For this purpose we used a fully coupled electromagnetic, thermodynamic and plasma dynamics model for a laser pulse interaction with gold nanospheres, nanorods and assemblies, which was solved using the finite element method. The thresholds of optical breakdown for off- and on-resonance irradiated gold nanosphere monomers were compared against nanosphere dimers, trimers, and gold nanorods with the same overall size and aspect ratio. The optical breakdown thresholds had a stronger dependence on the optical near-field enhancement than on the mass or absorption cross-section of the nanostructure. These findings can be used to advance the nanoparticle-based nanoscale manipulation of matter.
ISSN:2190-4286
2190-4286
DOI:10.3762/bjnano.7.79