Nonlinear Symmetry Breaking in Symmetric Oligomers

Mohsen Rahmani; Alexander S. Shorokhov; Ben Hopkins; Andrey E. Miroshnichenko; Maxim R. Shcherbakov; Rocio Camacho-Morales; Andrey A. Fedyanin; Dragomir N. Neshev; Yuri S. Kivshar

doi:10.1021/acsphotonics.6b00902

Nonlinear Symmetry Breaking in Symmetric Oligomers

Mohsen Rahmani^*, Alexander S. Shorokhov, Ben Hopkins, Andrey E. Miroshnichenko, Maxim R. Shcherbakov, Rocio Camacho-Morales, Andrey A. Fedyanin, Dragomir N. Neshev, Yuri S. Kivshar

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

A novel type of nonlinear symmetry breaking in symmetric plasmonic oligomers is reported. By monitoring the strength of the second-harmonic signal while changing the polarization angle of the pump, we observe nonlinear symmetry breaking as a large variation in the generated nonlinear signal. Importantly, the strongly anisotropic nonlinear response is produced by a symmetric structure with isotropic linear response when rotating polarization. We provide theoretical analysis to describe and characterize this effect. Our finding opens new avenues to reveal and characterize the symmetry of nanoscale structures and molecules and also to remotely monitor variations of near-field patterns produced by symmetric nanostructures.

Original language	English
Pages (from-to)	454-461
Number of pages	8
Journal	ACS Photonics
Volume	4
Issue number	3
DOIs	https://doi.org/10.1021/acsphotonics.6b00902
Publication status	Published - 15 Mar 2017

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title = "Nonlinear Symmetry Breaking in Symmetric Oligomers",

abstract = "A novel type of nonlinear symmetry breaking in symmetric plasmonic oligomers is reported. By monitoring the strength of the second-harmonic signal while changing the polarization angle of the pump, we observe nonlinear symmetry breaking as a large variation in the generated nonlinear signal. Importantly, the strongly anisotropic nonlinear response is produced by a symmetric structure with isotropic linear response when rotating polarization. We provide theoretical analysis to describe and characterize this effect. Our finding opens new avenues to reveal and characterize the symmetry of nanoscale structures and molecules and also to remotely monitor variations of near-field patterns produced by symmetric nanostructures.",

keywords = "nonlinear spectroscopy, polarization-selective device, subwavelength nanostructures, symmetry breaking",

author = "Mohsen Rahmani and Shorokhov, {Alexander S.} and Ben Hopkins and Miroshnichenko, {Andrey E.} and Shcherbakov, {Maxim R.} and Rocio Camacho-Morales and Fedyanin, {Andrey A.} and Neshev, {Dragomir N.} and Kivshar, {Yuri S.}",

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AU - Rahmani, Mohsen

AU - Shorokhov, Alexander S.

AU - Hopkins, Ben

AU - Miroshnichenko, Andrey E.

AU - Shcherbakov, Maxim R.

AU - Camacho-Morales, Rocio

AU - Fedyanin, Andrey A.

AU - Neshev, Dragomir N.

AU - Kivshar, Yuri S.

PY - 2017/3/15

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N2 - A novel type of nonlinear symmetry breaking in symmetric plasmonic oligomers is reported. By monitoring the strength of the second-harmonic signal while changing the polarization angle of the pump, we observe nonlinear symmetry breaking as a large variation in the generated nonlinear signal. Importantly, the strongly anisotropic nonlinear response is produced by a symmetric structure with isotropic linear response when rotating polarization. We provide theoretical analysis to describe and characterize this effect. Our finding opens new avenues to reveal and characterize the symmetry of nanoscale structures and molecules and also to remotely monitor variations of near-field patterns produced by symmetric nanostructures.

AB - A novel type of nonlinear symmetry breaking in symmetric plasmonic oligomers is reported. By monitoring the strength of the second-harmonic signal while changing the polarization angle of the pump, we observe nonlinear symmetry breaking as a large variation in the generated nonlinear signal. Importantly, the strongly anisotropic nonlinear response is produced by a symmetric structure with isotropic linear response when rotating polarization. We provide theoretical analysis to describe and characterize this effect. Our finding opens new avenues to reveal and characterize the symmetry of nanoscale structures and molecules and also to remotely monitor variations of near-field patterns produced by symmetric nanostructures.

KW - nonlinear spectroscopy

KW - polarization-selective device

KW - subwavelength nanostructures

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JO - ACS Photonics

JF - ACS Photonics

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Nonlinear Symmetry Breaking in Symmetric Oligomers

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