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Contents
ix
6.3.1.1 LSPR response of assemblies 268
6.3.1.2 Field enhancement 268
6.3.1.3 Plasmonic wave-guiding 269
6.3.2 Polarization Dependence of Coupling in a
Dimer 269
6.3.3 Dipolar-Coupling Model 271
6.3.4 Analogy to Exciton Coupling in Molecular
Aggregates 273
6.3.5 Bonding and Anti-Bonding of Plasmons 275
6.4 Spatial Profile of the Near-Field 277
6.4.1 Distance-Dependence of the Near-Field 278
6.4.2 Size-Scaling of Near-Field Decay 278
6.4.3 Direct Mapping of the Near-Field 280
6.5 Applications of Near-Field Coupling Concepts 283
6.5.1 Plasmon Ruler 283
6.5.2 Metal Nanoshells 284
6.5.3 Coupling in Larger Arrays 285
6.5.4 Molecular Sensing 285
6.6 Future Outlook 286
7 Noble Metal Nanostructure Enhancement of Fluorescence 295
R. J. Phaneuf
7.1 Introduction 295
7.2 Nanostructure Size, Shape and Spacing Dependence 298
7.3 Role of Substrate 302
7.4 Standing Wave Surface Plasmons 306
7.5 Spacer Layer Effect 312
8 Surface-Enhanced Raman Scattering 321
M. Sun
8.1 Introduction 322
8.2 Electromagnetic Mechanism and Numerical Methods 323
8.3 Chemical Mechanism and Visualization Method of
Charge Transfer 329
8.4 Synthesis and Experiment on SERS 333
8.5 Remote-Excitation SERS 339
8.6 Conclusions 346