Study on the Characteristics of Dipole-excited Localized Surface Plasmon on a Metal Layer Surface

First, we study the emission characteristics of the dipole coupling system with a localized surface plasmon (LSP) based on the boundary-integral-equation method (BIEM). Then, we try to explain the emission phenomenon by evaluating the mode pattern, phase distribution, and dispersion curve. Also, we calculate the angle-dependent emission to confirm this result. Second, the simulation results of a dipole coupling system with surface plasmon (SP) induced on a metal/dielectric interface of a single groove (SG) plus a grating structure are demonstrated. With the SG structure, the dipole can effectively couple energy into an SP feature, which has a mixed nature of LSP and surface plasmon polariton (SPP). The SPP energy is confined by the grating structure with its period about one-half the period of the SPP propagating field distribution. With such a cavity configuration, the SPP energy can be well preserved. Both the dipole-SP coupling behaviors in the frequency and time domains are numerically illustrated. The results are useful for designing a metal/dielectric interface nanostructure for implementing an SPASER (surface plasmon amplification by stimulated emission of radiation)Chapter 1 Introduction 1 1.1 Reseach background 1 1.2 Literature Reviews 4hapter 2 Theories 11.1 Surface Plasmons (SPs) Theories 11 2.1.1 Background Knowledge 11 2.1.2 Drude model 12 2.1.3 Surface Plasmon Polaritons at a Dielectric/Metal Interface 13 2.1.4 Localized Surface Plasmons (LSPs) 16.2 Mechanism of Quantum Well and SPs Coupling 17.3 Differentiate the Contributions of LSP and SPP 18.4 Boundary Integral-Equation Method (BIEM) 20hapter 3 Characterizations of Dipole Coupling with different LSPs 28.1 Parameter Definition and Problem Geometry 28.1 Numerical Technique 30.3 Numerical Results 31.4 Angle-dependent Emission 33hapter 4 Effective Energy Coupling and Preservation in a Surface Plasmon-Light Emitter Coupling System 42.1 Problem Geometry and Numerical Technique 42.2 Coupling Characteristics 44.3 Time-domain Behaviors 47.4 Summary 52hapter 5 Conclusion 60eferences 6