Extraordinary optical transmissionT.W.Ebbesengroup,1998StartpointofSPPBottleneck:low lighttransmittivityofapertures smallerthanthe wavelengthofincident photonHolearraysinsilverfilm:metalfilmthickness1Periodicity of holessao:dScale of holesResults:ExtraordinarytransmissionMaximum at X/d~10Influenceoft(inAPL)Explanation:Couplingof lightandplasmons0.51.522.5Wavelength/period11ExtraordinaryopticaltransmissionthroughsubwavelengthholesT.W.Ebbesenetal,NATURE/VOL39112FEBRUARY1998
11 Bottleneck: low light transmittivity of apertures smaller than the wavelength of incident photon Hole arrays in silver film: metal film thickness t Periodicity of holes a0 Scale of holes d Results: Extraordinary transmission Maximum at λ/d~10 Influence of t (in APL) Explanation: Coupling of light and plasmons Extraordinary optical transmission T.W.Ebbesen group , 1998 Extraordinary optical transmission through subwavelength holes T.W. Ebbesen et al, NATURE |VOL 391 | 12 FEBRUARY 1998 Start point of SPP
Beaminglightfromabull'seyesstructureT.W.Ebbesengroup,2002ProgressworkBTosolve:lightdiffractsinalldirectionswhenanapertureissmall.0.6Bull's eye of Ag film:0.2thickness300nmGrooveperiodicityy500nm400500600700800900Wavelength (nm)DCAnddepth60nmHolediamter250nm0.Results:Beaming lightAnoiedenExplanation:Couplingoflightandplasmons12Beaming lightfromasubwavelengthhole,T.W.Ebbesenetal,Science,297,820(2002)
12 Beaming light from a bull’s eyes structure T.W.Ebbesen group , 2002 Progress work Beaming light from a subwavelength hole, T.W. Ebbesen et al, Science,297,820(2002) To solve: light diffracts in all directions when an aperture is small. Bull’s eye of Ag film: thickness 300nm Groove periodicity 500nm And depth 60nm Hole diamter 250nm Results: Beaming light Explanation: Coupling of light and plasmons
Plasmon-assistedtransmissionofentangledphotonsE.Altewischer elal,2002ApplicationworkAimto:Investigatetheeffectsofnanostructuredmetalonentangledphotons.Results:Such arrays convert photonsintosurface-plasmonopticallyTELA1A11excitedcompressivechargeHWPIFBBOP1densitywaveswhichtunnelthroughtheholesbeforetreradiating as photons.P2C0A2Explanation:Conversionbetweenphotonsandplasmons,quantumfeatureofSPp13Plasmon-assistedtransmissionofentangledphotonsE.Altewischer,M.P.vanExter&J.P.Woerdman,NATURE/VOL418304|2002
13 Plasmon-assisted transmission of entangled photons E. Altewischer el al, 2002 Application work Plasmon-assisted transmission of entangled photons, E. Altewischer, M. P. van Exter & J. P. Woerdman, NATURE |VOL 418 | 304| 2002 | Aim to: Investigate the effects of nanostructured metal on entangled photons. Results: Such arrays convert photons into surface-plasmon —optically excited compressive charge density waves — which tunnel through the holes before reradiating as photons. Explanation: Conversion between photons and plasmons, quantum feature of SPP