Second-harmonic generation in gold crescent- and comma-like nanostructures

Anisotropic metal nanostructures reveal unique optical properties providing new optical effects. Here we study experimentally the nonlinear-optical response of planar arrays of gold comma-like and crescent-like nanostructures made by colloidal lithography. We show that anisotropy of the nonlinear-op...

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Bibliographic Details
Published in:Optics letters 2019-11, Vol.44 (22), p.5473
Main Authors: Kolmychek, I. A., Mamonov, E. A., Bochenkov, V. E., Murzina, T. V.
Format: Article
Language:English
Subjects:
Anisotropy
Dichroism
Gold
Nanostructure
Nonlinear response
Optical properties
Second harmonic generation
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Summary:Anisotropic metal nanostructures reveal unique optical properties providing new optical effects. Here we study experimentally the nonlinear-optical response of planar arrays of gold comma-like and crescent-like nanostructures made by colloidal lithography. We show that anisotropy of the nonlinear-optical response is defined not only by the shape of the particles, but also by the relative phase of second-order susceptibility components, which are found to be spectrally sensitive. High values of circular dichroism in the second-harmonic generation response up to 70% are observed in comma-like nanostructures.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.44.005473