Tailoring magnetic and electric resonances with dielectric nanocubes for broadband and high-efficiency unidirectional scattering

(整期优先)网络出版时间:2016-01-11
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Theinterferenceofopticallyinducedelectricandmagneticresonancesinhigh-refractive-indexdielectricnanoparticlesprovidesanewapproachtocontrolandshapethescatteringpatternsoflightinthefieldofnanophotonics.InthisLetter,wespectrallytunetheelectricandmagneticresonancesbyvaryingthegeometryofasingleisolatedleadtelluride(PbTe)dielectricnanocube.Then,weoverlaptheelectricdipoleresonanceandmagneticdipoleresonancetosuppressbackwardscatteringandenhanceforwardscatteringintheresonanceregion.Furthermore,abroadbandunidirectionalscatteringisachievedbystructuringthedielectricnanocuboidsasatrimerantenna.