Search

The article presents the authors' view on the progress and future prospects of plasmonics in generation of wave communication. They mention the two main components of plasmonics including surface plasmon (SP) polaritons and localized surface plasmons (LSPs), and also the applications of plasmonics including plasmonic lasers, plasmonic switches and plasmonic waveguides. Reduction in electron confinement, structural imperfections and metal heating losses in plasmonics are also suggested.

Localized surface plasmon resonance (LSPR) for longitudinal mode of gold nanorod is simulated by using Gans theory. The parameters like surface scattering, radiation damping, and dynamic depolarization of radiation across the surface of nanorod affecting response of free electrons towards optical excitation are considered. Simulation results show that refractive index sensitivity linearly rises with size and aspect ratio, whereas this leads to the broadening of resonant line width also. Therefore, to optimize the size of nanorod, figure of merit (FOM) is calculated and observed that optimized width is 15 nm for an aspect ratio of 2, whereas it is 12 nm for aspect ratios 3 and 4. Further, optimization by using newly modified figure of merit (MFOM) shows that optimized width is 39 nm for aspect ratio of 2 and 24 nm for 3 and 4 aspect ratios. It is also found that at aspect ratio 2, both FOM and MFOM are higher than the aspect ratios 3 and 4. The quality factor calculation for LSPR response of nanorod explains its dependence with aspect ratio and optimized dimensions. [ABSTRACT FROM AUTHOR]