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Proceedings Paper

Second harmonic generation dynamics in plasmonic nanoparticles
Author(s): Gabriel D. Bernasconi; Jérémy Butet; Olivier J. F. Martin
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Paper Abstract

Due to its symmetry properties, second-harmonic generation in plasmonic nanostructures enables the observation of even-parity modes that couple weakly to the far field. Consequentially, those modes radiate less and thus have a longer lifetime. Using a full-wave numerical method, we study the linear and second harmonic dynamical responses of a silver nanorod under plane-wave femtosecond pulse illumination. Depending on the spectral position and duration of the pulse, the decaying field of the different modes can be separated, and the free oscillations of each mode are well fitted by a damped harmonic oscillator model, both in the linear and nonlinear regimes. Additionally, interference effects between different modes excited at the second harmonic are observed.

Paper Details

Date Published: 19 September 2018
PDF: 7 pages
Proc. SPIE 10722, Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVI, 107221U (19 September 2018); doi: 10.1117/12.2321004
Show Author Affiliations
Gabriel D. Bernasconi, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Jérémy Butet, Ecole Polytechnique Fédérale de Lausanne (Switzerland)
Olivier J. F. Martin, Ecole Polytechnique Fédérale de Lausanne (Switzerland)


Published in SPIE Proceedings Vol. 10722:
Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XVI
Din Ping Tsai; Takuo Tanaka, Editor(s)

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