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Probing the transition from an uncoupled to a strong near-field coupled regime between bright and dark mode resonators in metasurfaces

Singh, Ranjan; Al-Naib, Ibraheem; Roy Chowdhury, Dibakar; Cong, L; Rockstuhl, Carsten; Zhang, Weili

Description

The coupling of multiple plasmonic resonators that sustain bright or dark modes provide intriguing spectral signatures. However, probing the onset of coupling effects while engaging the resonators with an increasing proximity has not yet been studied experimentally in detail. Nevertheless, this is of utmost importance to bridge the phenomenological understanding with the peculiarities of realworld-samples. Here, we take advantage of the ability to control spatial dimensions of THz metasurfaces...[Show more]

dc.contributor.authorSingh, Ranjan
dc.contributor.authorAl-Naib, Ibraheem
dc.contributor.authorRoy Chowdhury, Dibakar
dc.contributor.authorCong, L
dc.contributor.authorRockstuhl, Carsten
dc.contributor.authorZhang, Weili
dc.date.accessioned2016-06-14T23:20:38Z
dc.identifier.issn0003-6951
dc.identifier.urihttp://hdl.handle.net/1885/103473
dc.description.abstractThe coupling of multiple plasmonic resonators that sustain bright or dark modes provide intriguing spectral signatures. However, probing the onset of coupling effects while engaging the resonators with an increasing proximity has not yet been studied experimentally in detail. Nevertheless, this is of utmost importance to bridge the phenomenological understanding with the peculiarities of realworld-samples. Here, we take advantage of the ability to control spatial dimensions of THz metasurfaces deep in the sub-wavelength domain to study different regimes that occur while coupling split-ring-resonators that sustain a bright and a dark mode with increasing strength. We identify the length scales at which the resonators are uncoupled and then enter the regimes of weak, moderate, and strong coupling. It is shown that a strong coupling takes place only at distances smaller than one hundredth of the resonance wavelength. Understanding the features that emerge from such hybridization is important to take advantage of fundamental effects in metamaterials such as classical analogs of electromagnetically induced transparency, lasing spaser, near-field manipulation, and sensing with dark mode resonances.
dc.publisherAmerican Institute of Physics (AIP)
dc.sourceApplied Physics Letters
dc.titleProbing the transition from an uncoupled to a strong near-field coupled regime between bright and dark mode resonators in metasurfaces
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume105
dc.date.issued2014
local.identifier.absfor090000 - ENGINEERING
local.identifier.ariespublicationU3488905xPUB7867
local.type.statusPublished Version
local.contributor.affiliationSingh, Ranjan, Center for Disruptive Photonic Technologies
local.contributor.affiliationAl-Naib, Ibraheem, Queen's University
local.contributor.affiliationRoy Chowdhury, Dibakar, College of Engineering and Computer Science, ANU
local.contributor.affiliationCong, L, Nanyang Technological University
local.contributor.affiliationRockstuhl, Carsten, Karlsruhe Institute of Technology
local.contributor.affiliationZhang, Weili, Oklahoma State University
local.description.embargo2037-12-31
local.bibliographicCitation.issue8
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage5
local.identifier.doi10.1063/1.4893726
dc.date.updated2016-06-14T08:51:02Z
local.identifier.scopusID2-s2.0-84907301247
CollectionsANU Research Publications

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