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1、JournalofQuantitativeSpectroscopy&RadiativeTransfer162(2015)122–132ContentslistsavailableatScienceDirectJournalofQuantitativeSpectroscopy&RadiativeTransferjournalhomepage:www.elsevier.com/locate/jqsrtPhotonicnanojetsinopticaltweezersAntonioAlvaroRanhaNevesCentrodeCiênciasNatura
2、iseHumanas,UniversidadeFederaldoABC(UFABC),SantoAndré–SãoPaulo09.210-170,BrazilarticleinfoabstractArticlehistory:PhotonicnanojetshavebeenbroughtintoattentiontenyearsagoforpotentialapplicationReceived4February2015inultramicroscopy,becauseofitssub-wavelengthresolutionthatcanenhan
3、cedetectionReceivedinrevisedformandinteractionwithmatter.Forthesenovelapplicationsunderdevelopment,theoptical12March2015trappingofasphereactsasanidealframeworktoemployphotonicnanojets.IntheAccepted17March2015presentstudy,wegeneratednanojetsbyusingahighlyfocusedincidentbeam,inco
4、ntrastAvailableonline25March2015totraditionalplanewaves.Themethodinheritstheadvantageofopticaltrapping,Keywords:especiallyforintracellularapplications,withthemicrosphereinequilibriumonthebeamPhotonicnanojetspropagationaxisandpositionedarbitrarilyinspace.Moreover,owingtoopticals
5、catteringGeneralizedLorenz–Mietheoryforces,whenthesphereisinequilibrium,itscentershiftswithrespecttothefocalpointofBeamshapecoefficientstheincidentbeam.However,whenthesystemisinstableequilibriumwithaconfigura-Miescatteringtioninvolvingopticaltweezers,photonicnanojetscannotbefor
6、med.ToovercomethisOpticaltweezersoropticalmanipulationDielectricparticlesissue,weemployeddoubleopticaltweezersinanunorthodoxconfigurationinvolvingtwocollinearandco-propagatingbeams,theprecisepositioningofwhichwouldturnon/offthephotonicnanojets,therebyimprovingtheapplicabilityof
7、photonicnanojets.&2015ElsevierLtd.Allrightsreserved.1.Introduction(GLMT)[5],asinthestudybyDevilezetal.[6].SuchfocusingoflightusingamicrospherehasalsobeeninvestigatedbyAphotonicnanojet(PNJ)isanarrow(subwavelength)Kofleretal.[7]usingtheuniformcausticasymptoticmethod,andelongatedr
8、egionwithhighintensitylocatedatthetoobtainanalyticalex
