The Guiding Mechanism of Nonradiative Surface Plasmon (SP) Energy Transfer Along the Metallic Nanowire

The paper investigates non-radiative, near-field evanescent surface plasmon (SP) energy transport along the metallic nanowire by deriving the dispersion curves and damping relations through modified Bessel function based modal electromagnetic (EM) field expansion and transmission line analysis methods. By employing the Fabry-Perot resonator analysis and finite difference time domain (FDTD) simulation, the paper further demonstrates that the constructive multiple interference (L=npi/k_z), skin depth (delta), and operational frequency (omega) play an essential role in determining the transmittance efficiency of SP energy transfer along the metallic nanowire.