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Proceedings Paper

Large nonlinear refraction in gold island films under nano- and femto-second laser pulse excitation
Author(s): A. Borshch; M. Brodyn; R. Fedorovich; V. Liakhovetskyi; P. Tomchuk; V. Volkov; L. Makarovsky; Yu. Nikitaev; F. Gostev
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Paper Abstract

Giant nonlinear refraction has been experimentally observed in gold island films. The real part of the third-order nonlinear susceptibility χ(3)(ω;ω,-ω,ω) reaches a value of -8×10-5 esu (λ = 532 nm, τ = 10 ns) and +5×10-7 esu (λ = 800 nm, τ = 85 fs). The mechanism of nonlinearity of the refractive index can be associated with the resonance enhancement of the factor of the local optical field at the pump wavelength due to the excitation of surface plasmons, as well as with the contribution of the heating of conduction electrons in an ensemble of metal particles.

Paper Details

Date Published: 23 April 2008
PDF: 6 pages
Proc. SPIE 6988, Nanophotonics II, 69881L (23 April 2008); doi: 10.1117/12.778295
Show Author Affiliations
A. Borshch, Institute of Physics (Ukraine)
M. Brodyn, Institute of Physics (Ukraine)
R. Fedorovich, Institute of Physics (Ukraine)
V. Liakhovetskyi, Institute of Physics (Ukraine)
P. Tomchuk, Institute of Physics (Ukraine)
V. Volkov, Institute of Physics (Ukraine)
L. Makarovsky, Moscow Institute of Physics and Technology (Russia)
Yu. Nikitaev, Moscow Institute of Physics and Technology (Russia)
F. Gostev, Institute of Chemical Physics (Russia)

Published in SPIE Proceedings Vol. 6988:
Nanophotonics II
David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

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