Plasmonics的前沿和应用（讲稿）

百纳米金棒间的SPR耦合3.22.01.5.01.51.01.0810nm(cne)Buuane747nm1.2d1.F716nm674nm1.结果：金的结果与银类似，平1.2行排列时SPR红移，垂直时蓝1.11.0移，相互垂直是发生分裂。600700800600700800Wavelength (nm)16PlasmonCouplingof Gold NanorodsatShortDistancesand in DifferentGeometriesAlisonM.Funstonetal,NANOLETTERS(2009)Vol.9,No.4,1651-1658

16 百纳米金棒间的SPR耦合 Plasmon Coupling of Gold Nanorods at Short Distances and in Different Geometries Alison M. Funston et al, NANO LETTERS (2009) Vol. 9, No. 4,1651-1658 结果：金的结果与银类似，平 行排列时SPR红移，垂直时蓝 移，相互垂直是发生分裂

能级”SPR的分裂图b)a)--111:+工1111I1:12R*25Caennseenl.1++4MonomerDimerMonomerDimersMonomerMonomer17Plasmon Couplingof Gold NanorodsatShortDistancesand in Different GeometriesAlisonM.Funstonetal,NANOLETTERS(2009)Vol.9,No.4.1651-1658

17 SPR的“能级”分裂图 Plasmon Coupling of Gold Nanorods at Short Distances and in Different Geometries Alison M. Funston et al, NANO LETTERS (2009) Vol. 9, No. 4,1651-1658

百纳米量级金棒SPR耦合与金棒间距离的关系-IsolatedNRIsolated NRa)b)DistanceRDistance R25120nm120nm2.0orae60nm60mm201.630nm30mm1522nm22mm1.220 nm20nm100.8n0.40-0.04006008001000500700300400600Wavelength (nm)Wavelength(nm)IsolatedNRIsolatedNRc)d)DimerDimer3.025TrimerTrimer2.5oro202.031.5101.05.0.50.004006008001000300400500600700Wavelength(nm)Wavelength (nm)结果：在光场偏振垂直于纳米棒间的中心连线时，#当棒间距离越近，蓝移得越远；当增加棒的个数时，蓝移得越远。中Plasmon Coupling in NanorodAssemblies:Optical Absorption,Discrete DipoleApproximation SimUiationandExciton-CouplingModelPrashantK.Jainetal,J.Phys.Chem.B(2006)110,18243-18253

18 百纳米量级金棒SPR耦合与金棒间距离的关系 Plasmon Coupling in Nanorod Assemblies: Optical Absorption, Discrete Dipole Approximation Simulation, and Exciton-Coupling Model，Prashant K. Jain et al, J. Phys. Chem. B (2006) 110, 18243-18253 结果：在光场偏振垂直于纳米棒间的中心连线时，当棒间距离越近， 蓝移得越远；当增加棒的个数时，蓝移得越远

Isolated NRIsolatedNRDistanceRDistance Rb)E282ma)282nm-121mm121 nm1.2aaa2891mm91 nm83nm83 mm210.981nm81nm0.6140.300.050030040060070040060080010001200Wavelength (nm)Wavelength (mm)d)c)Isolated NRIsolated NRDimerDimer301.2TrimerTrimeraoae240.9180.61260.300.040050060070030040060080010001200Wavelength (nm)Wavelength (nm)结果：在光场偏振平行于纳米棒间的中心连线时，当棒间距离越近，红移得越远；当增加棒的个数时，红移得越远。PlasmonCouplinginNanorodAssemblies:OpticalAbsorption,DiscreteDipoleApproximation19Simulation,andExciton-Coupling.ModelPrashantK.Jainetal.J.Phys.Chem.B(2006)110,18243-18253

19 Plasmon Coupling in Nanorod Assemblies: Optical Absorption, Discrete Dipole Approximation Simulation, and Exciton-Coupling Model Prashant K. Jain et al, J. Phys. Chem. B (2006) 110, 18243-18253 结果：在光场偏振平行于纳米棒间的中心连线时，当棒间距离 越近，红移得越远；当增加棒的个数时，红移得越远

纳米金属颗粒间SPR耦合的标度律(a)(b)(a)30Gep =2nm(uu)Gap =2 nmExperiment-Gep=8nmGap=7nm0.0620.Gep=12nmGap=12nmGep=18mmsGap=17nm20Gep = 28 mGap=27nm0.04Gep =208nmGap=212mmosel840Uo5ux100.0250.00.00050100150200....500700600800500600700800Wavolength (nm)Wavelength (nm)(b)(c)(d)6C(wu)Simulation.Gep = 2 nmGap=2nm12Gop=8nm0.08Gap=7nmGop=12nmGap=12nmiusGop=18nm40Gap=17.nmGap=28nmGap=27nmGap=208nm0.04oseGap=212nm00200.020.0.00050150100200500600700800500600700800Inter-particlegap (nm)Wavelength (nm)Wavelength (nm)结果：从两个样品的吸收和消光峰以及理论和实验上共振峰移-(s/D)动规律，可以得到标度律0.18exp0.23OntheUniversal ScalingBehavioroftheDistanceDecayof PlasmonCouplinginMetal20nanoparticlePairs:APlasmonRulerEguationPrashantK.Jainetal,NANOLETTERS(2007)Vol.7,No.7,2080-2088

20 纳米金属颗粒间SPR耦合的标度律 On the Universal Scaling Behavior of the Distance Decay of Plasmon Coupling in Metal nanoparticle Pairs: A Plasmon Ruler Equation Prashant K. Jain et al, NANO LETTERS (2007) Vol. 7, No. 7,2080-2088 结果：从两个样品的吸收和消光峰以及理论和实验上共振峰移 动规律，可以得到标度律