Second Harmonic Generation from Phase-Engineered Metasurfaces of Nanoprisms

Kanta Mochizuki; Mako Sugiura; Hirofumi Yogo; Stefan Lundgaard; Jingwen Hu; Soon Hock Ng; Yoshiaki Nishijima; Saulius Juodkazis; Atsushi Sugita

doi:10.3390/mi11090848

Micromachines (Sep 2020)

Second Harmonic Generation from Phase-Engineered Metasurfaces of Nanoprisms

Kanta Mochizuki,
Mako Sugiura,
Hirofumi Yogo,
Stefan Lundgaard,
Jingwen Hu,
Soon Hock Ng,
Yoshiaki Nishijima,
Saulius Juodkazis,
Atsushi Sugita

Affiliations

Kanta Mochizuki: Department of Applied Chemistry and Biochemical Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan
Mako Sugiura: Department of Applied Chemistry and Biochemical Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan
Hirofumi Yogo: Department of Applied Chemistry and Biochemical Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan
Stefan Lundgaard: Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
Jingwen Hu: Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
Soon Hock Ng: Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
Yoshiaki Nishijima: Department of Physics, Electrical and Computer Engineering, Graduate School of Engineering, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan
Saulius Juodkazis: Optical Sciences Centre and ARC Training Centre in Surface Engineering for Advanced Materials (SEAM), School of Science, Swinburne University of Technology, Hawthorn, VIC 3122, Australia
Atsushi Sugita: Department of Applied Chemistry and Biochemical Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka 432-8561, Japan

DOI: https://doi.org/10.3390/mi11090848
Journal volume & issue: Vol. 11, no. 9
p. 848

Abstract

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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 second-order nonlinearity were examined for SHG. The thickness of the SiO2 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 × 103 times for the optimised conditions.

Published in Micromachines

ISSN: 2072-666X (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Mechanical engineering and machinery
Website: https://www.mdpi.com/journal/micromachines

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