Silencing and enhancement of second-harmonic generation in optical gap antennas

Optics Express
Johann BerthelotAlexandre Bouhelier

Abstract

Amplifying local electromagnetic fields by engineering optical interactions between individual constituents of an optical antenna is considered fundamental for efficient nonlinear wavelength conversion in nanometer-scale devices. In contrast to this general statement we show that high field enhancement does not necessarily lead to an optimized nonlinear activity. In particular, we demonstrate that second-harmonic responses generated at strongly interacting optical gap antennas can be significantly suppressed. Numerical simulations are confirming silencing of second-harmonic in these coupled systems despite the existence of local field amplification. We then propose a simple approach to restore and amplify the second-harmonic signal by changing the manner in which electrically-connected optical antennas are interacting in the charge-transfer plasmon regime. Our observations provide critical design rules for realizing optimal structures that are essential for a broad variety of nonlinear surface-enhanced characterizations and for realizing the next generation of electrically-driven optical antennas.

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Citations

Mar 23, 2013·Physical Chemistry Chemical Physics : PCCP·Anke HorneberDai Zhang
Jan 8, 2016·Scientific Reports·Xiaoyan Y Z XiongWeng Cho Chew
May 27, 2015·Nano Letters·Myung-Ki KimYong-Hee Lee
Oct 26, 2012·Scientific Reports·Yoshito TanakaKeiji Sasaki
Jul 28, 2015·Nano Letters·Mickael BuretAlexandre Bouhelier
Apr 5, 2014·Nano Letters·Arnaud StolzAlexandre Bouhelier
Nov 23, 2013·Nano Letters·F DuttoA Radenovic
Feb 2, 2017·Nanoscale·Lei WangYuri Kivshar
Dec 6, 2014·Applied Spectroscopy·Alexandre Merlen, François Lagugné-Labarthet
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Jun 16, 2016·Optics Letters·Robert CzaplickiMartti Kauranen
Dec 5, 2019·Nanoscale·Jiyong WangDai Zhang
Nov 10, 2016·Optics Express·Dana-Codruta MarinicaAndrei G Borisov
Nov 3, 2017·Optics Express·Bruno MajérusOliver J F Martin
Aug 18, 2018·Optics Express·Ali KhademiReuven Gordon
Nov 21, 2015·Physical Review Letters·Sviatlana ViarbitskayaAlexandre Bouhelier
Mar 31, 2018·Physical Review Letters·Semyon ChervinskiiAndrey Lipovskii
Oct 30, 2020·Optics Express·Maya H Shor PeledAvi Niv
Oct 24, 2020·Beilstein Journal of Nanotechnology·Monika FleischerAlfred J Meixner
Oct 24, 2020·The Journal of Chemical Physics·Shaoxin ShenZhilin Yang
Dec 17, 2019·ACS Nano·Yun-Hang QiuQu-Quan Wang
Mar 28, 2018·Nano Letters·Godofredo BautistaMonika Fleischer

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