Second Harmonic Generation from Phase-Engineered Metasurfaces of Nanoprisms

Metasurfaces of gold (Au) nanoparticles on a SiO [Formula: see text]-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 second-order nonlinearity were e...

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Autores principales: Mochizuki, Kanta, Sugiura, Mako, Yogo, Hirofumi, Lundgaard, Stefan, Hu, Jingwen, Ng, Soon Hock, Nishijima, Yoshiaki, Juodkazis, Saulius, Sugita, Atsushi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7569796/
https://www.ncbi.nlm.nih.gov/pubmed/32932670
http://dx.doi.org/10.3390/mi11090848
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author Mochizuki, Kanta
Sugiura, Mako
Yogo, Hirofumi
Lundgaard, Stefan
Hu, Jingwen
Ng, Soon Hock
Nishijima, Yoshiaki
Juodkazis, Saulius
Sugita, Atsushi
author_facet Mochizuki, Kanta
Sugiura, Mako
Yogo, Hirofumi
Lundgaard, Stefan
Hu, Jingwen
Ng, Soon Hock
Nishijima, Yoshiaki
Juodkazis, Saulius
Sugita, Atsushi
author_sort Mochizuki, Kanta
collection PubMed
description Metasurfaces of gold (Au) nanoparticles on a SiO [Formula: see text]-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 second-order nonlinearity were examined for SHG. The thickness of the SiO [Formula: see text] spacer is shown to be an effective parameter to tune for maximising SHG. Electrical field enhancement at the fundamental wavelength was shown to define the SHG intensity. 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 × 10 [Formula: see text] times for the optimised conditions.
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spelling pubmed-75697962020-10-27 Second Harmonic Generation from Phase-Engineered Metasurfaces of Nanoprisms Mochizuki, Kanta Sugiura, Mako Yogo, Hirofumi Lundgaard, Stefan Hu, Jingwen Ng, Soon Hock Nishijima, Yoshiaki Juodkazis, Saulius Sugita, Atsushi Micromachines (Basel) Article Metasurfaces of gold (Au) nanoparticles on a SiO [Formula: see text]-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 second-order nonlinearity were examined for SHG. The thickness of the SiO [Formula: see text] spacer is shown to be an effective parameter to tune for maximising SHG. Electrical field enhancement at the fundamental wavelength was shown to define the SHG intensity. 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 × 10 [Formula: see text] times for the optimised conditions. MDPI 2020-09-12 /pmc/articles/PMC7569796/ /pubmed/32932670 http://dx.doi.org/10.3390/mi11090848 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mochizuki, Kanta
Sugiura, Mako
Yogo, Hirofumi
Lundgaard, Stefan
Hu, Jingwen
Ng, Soon Hock
Nishijima, Yoshiaki
Juodkazis, Saulius
Sugita, Atsushi
Second Harmonic Generation from Phase-Engineered Metasurfaces of Nanoprisms
title Second Harmonic Generation from Phase-Engineered Metasurfaces of Nanoprisms
title_full Second Harmonic Generation from Phase-Engineered Metasurfaces of Nanoprisms
title_fullStr Second Harmonic Generation from Phase-Engineered Metasurfaces of Nanoprisms
title_full_unstemmed Second Harmonic Generation from Phase-Engineered Metasurfaces of Nanoprisms
title_short Second Harmonic Generation from Phase-Engineered Metasurfaces of Nanoprisms
title_sort second harmonic generation from phase-engineered metasurfaces of nanoprisms
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7569796/
https://www.ncbi.nlm.nih.gov/pubmed/32932670
http://dx.doi.org/10.3390/mi11090848
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