Spiral Surface plasmon Modes on metallic Nanorod and Nanohole

  • 陳 治民

Student thesis: Doctoral Thesis

Abstract

Spiral surface plasmon (SSP) modes on uniform and tapered silver nanorods are explored by performing both simulations and theoretical analyses On a uniform nanorod with its radius equal to 240 nm the SSP modes can be generated by linearly superposed higher-order HE1 and HE2 eigenmodes Both the single- and triple-stranded SSP modes are produced by controlling the relative rotation direction of the two component modes On a tapered nanorod the spiral pitch of the SSP mode decreases with the reduction of nanorod radius However the field energy density along the nanorod axis increases to a maximum value and then falls On the other hand spiral surface plasmon (SSP) modes which spirally propagate inside a silver nanohole are explored by performing both simulations and theoretical analyses The SSP modes are formed by linearly superposed HE1 and HE2 modes just the same method as the silver nanorods do The spiral pattern originates in the beating of the two component modes Both singlet- and triplet-strand SSP modes can also be generated by controlling the relative rotation direction of the two component modes as silver nanorods do The spiral pitch of SSP modes decreases with the reduction of nanohole radius but it is inversely related to the incident wavelength
Date of Award2014 Sep 2
Original languageEnglish
SupervisorYung-Chiang Lan (Supervisor)

Cite this

Spiral Surface plasmon Modes on metallic Nanorod and Nanohole
治民, 陳. (Author). 2014 Sep 2

Student thesis: Doctoral Thesis