Substrate and Fano Resonance Effects on the Reversal of Optical Binding Force between Plasmonic Cube Dimers

Abstract The behavior of Fano resonance and the reversal of near field optical binding force of dimers over different substrates have not been studied so far. Notably, for particle clustering and aggregation, controlling the near filed binding force can be a key factor. In this work, we observe that...

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Autores principales:	M. R. C. Mahdy, Tianhang Zhang, Md. Danesh, Weiqiang Ding
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/25862aee9bfe46b5a444879f527f6f37
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spelling	oai:doaj.org-article:25862aee9bfe46b5a444879f527f6f372021-12-02T16:07:58ZSubstrate and Fano Resonance Effects on the Reversal of Optical Binding Force between Plasmonic Cube Dimers10.1038/s41598-017-07158-z2045-2322https://doaj.org/article/25862aee9bfe46b5a444879f527f6f372017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07158-zhttps://doaj.org/toc/2045-2322Abstract The behavior of Fano resonance and the reversal of near field optical binding force of dimers over different substrates have not been studied so far. Notably, for particle clustering and aggregation, controlling the near filed binding force can be a key factor. In this work, we observe that if the closely located plasmonic cube homodimers over glass or high permittivity dielectric substrate are illuminated with plane wave, no reversal of lateral optical binding force occurs. But if we apply the same set-up over a plasmonic substrate, stable Fano resonance occurs along with the reversal of near field lateral binding force. It is observed that during such Fano resonance, stronger coupling occurs between the dimers and plasmonic substrate along with the strong enhancement of the substrate current. Such binding force reversals of plasmonic cube dimers have been explained based on the observed unusual behavior of optical Lorentz force during the induced stronger Fano resonance and the dipole-dipole resonance. Although previously reported reversals of near field optical binding forces were highly sensitive to particle size/shape (i.e. for heterodimers) and inter-particle distance, our configuration provides much relaxation of those parameters and hence could be verified experimentally with simpler experimental set-ups.M. R. C. MahdyTianhang ZhangMd. DaneshWeiqiang DingNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q M. R. C. Mahdy Tianhang Zhang Md. Danesh Weiqiang Ding Substrate and Fano Resonance Effects on the Reversal of Optical Binding Force between Plasmonic Cube Dimers
description	Abstract The behavior of Fano resonance and the reversal of near field optical binding force of dimers over different substrates have not been studied so far. Notably, for particle clustering and aggregation, controlling the near filed binding force can be a key factor. In this work, we observe that if the closely located plasmonic cube homodimers over glass or high permittivity dielectric substrate are illuminated with plane wave, no reversal of lateral optical binding force occurs. But if we apply the same set-up over a plasmonic substrate, stable Fano resonance occurs along with the reversal of near field lateral binding force. It is observed that during such Fano resonance, stronger coupling occurs between the dimers and plasmonic substrate along with the strong enhancement of the substrate current. Such binding force reversals of plasmonic cube dimers have been explained based on the observed unusual behavior of optical Lorentz force during the induced stronger Fano resonance and the dipole-dipole resonance. Although previously reported reversals of near field optical binding forces were highly sensitive to particle size/shape (i.e. for heterodimers) and inter-particle distance, our configuration provides much relaxation of those parameters and hence could be verified experimentally with simpler experimental set-ups.
format	article
author	M. R. C. Mahdy Tianhang Zhang Md. Danesh Weiqiang Ding
author_facet	M. R. C. Mahdy Tianhang Zhang Md. Danesh Weiqiang Ding
author_sort	M. R. C. Mahdy
title	Substrate and Fano Resonance Effects on the Reversal of Optical Binding Force between Plasmonic Cube Dimers
title_short	Substrate and Fano Resonance Effects on the Reversal of Optical Binding Force between Plasmonic Cube Dimers
title_full	Substrate and Fano Resonance Effects on the Reversal of Optical Binding Force between Plasmonic Cube Dimers
title_fullStr	Substrate and Fano Resonance Effects on the Reversal of Optical Binding Force between Plasmonic Cube Dimers
title_full_unstemmed	Substrate and Fano Resonance Effects on the Reversal of Optical Binding Force between Plasmonic Cube Dimers
title_sort	substrate and fano resonance effects on the reversal of optical binding force between plasmonic cube dimers
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/25862aee9bfe46b5a444879f527f6f37
work_keys_str_mv	AT mrcmahdy substrateandfanoresonanceeffectsonthereversalofopticalbindingforcebetweenplasmoniccubedimers AT tianhangzhang substrateandfanoresonanceeffectsonthereversalofopticalbindingforcebetweenplasmoniccubedimers AT mddanesh substrateandfanoresonanceeffectsonthereversalofopticalbindingforcebetweenplasmoniccubedimers AT weiqiangding substrateandfanoresonanceeffectsonthereversalofopticalbindingforcebetweenplasmoniccubedimers
_version_	1718384642467299328

Substrate and Fano Resonance Effects on the Reversal of Optical Binding Force between Plasmonic Cube Dimers

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