Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Second Harmonic Generation From Phase-Engineered Metasurfaces of Nanoprisms

Kannta Mochizuki
,
Mako Sugiura
,
Hirofumi Yogo
,
Stefan Lundgaard
ORCID logo ,
Jingwen Hu
,
Soon Hock Ng
ORCID logo ,
Yoshiaki Nishijima
,
Saulius Juodkazis
* ,
Atsushi Sugita
*
Version 1 : Received: 12 August 2020 / Approved: 13 August 2020 / Online: 13 August 2020 (11:32:52 CEST)

A peer-reviewed article of this Preprint also exists.

Mochizuki, K.; Sugiura, M.; Yogo, H.; Lundgaard, S.; Hu, J.; Ng, S.H.; Nishijima, Y.; Juodkazis, S.; Sugita, A. Second Harmonic Generation from Phase-Engineered Metasurfaces of Nanoprisms. Micromachines 2020, 11, 848. Mochizuki, K.; Sugiura, M.; Yogo, H.; Lundgaard, S.; Hu, J.; Ng, S.H.; Nishijima, Y.; Juodkazis, S.; Sugita, A. Second Harmonic Generation from Phase-Engineered Metasurfaces of Nanoprisms. Micromachines 2020, 11, 848.

Abstract

Metasurfaces of gold (Au) nanoparticles on a SiO2-Si substrate were fabricated for the enhancement of second harmonic generation (SHG) using electron beam lithography and lift-off. Triangular Au nanoprisms which are non-centro-symmetric and support the second- order non-linearity were examined for SHG. The thickness of the SiO2 spacer is shown to be an efficient parameter to spectrally tune to maximise SHG. Electrical field enhancement at the fundamental wavelength was shown to define the intensity of the second harmonics. Numerical modeling of light enhancement was verified by experimental measurements of SHG and reflectivity spectra at the normal incidence. At the plasmonic resonance, SHG is enhanced up to ∼3.5×103 times for the optimised conditions.

Keywords

metasurfaces, second harmonic generation, phase control, finite difference time domain

Subject

Physical Sciences, Optics and Photonics

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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