Date:

2025-04-30

Title of Paper:

Negative curvature dependent plasmonic coupling and local field enhancement of crescent silver nanostructure

Journal:

J Nanopart Res

Summary:

The plasmonic spectra and local field
enhancement properties of the silver nanocrescent
with fixed maximum thickness are theoretically studied
using the discrete dipole approximation calculation.
Both the particle plasmon mode and tip-cavity
plasmonic coupling of the nanocrescent could be fine
tuned by controlling the negative curvature of the
nanocavity. The plasmonic conversion between particle
plasmon of the silver tip and symmetric plasmon
hybridization of the silver shell could be switched by
changing the open and close state of the nanocavity.
The intensity of intra-particle plasmonic coupling
between tip and cavity resonance and the corresponding
local field enhancement could also be tuned by the
cavity radius. This study indicates that the metal
surface with changing negative curvature takes great
effect on the surface charge distribution of the metallic
nanostructure and then controls the plasmon coupling
and local field enhancement.

Co-author:

Jian Zhu ， Ying-juan Ren

Volume:

J Nanopart Res (2012) 14:1326

Page Number:

J Nanopart Res (2012) 14:1326

Translation or Not:

No

Date of Publication:

2012-10-01