Date:

2025-04-30

Title of Paper:

Frequency-Dependent Polarization Properties of Local Electric Field in Gold–Dielectric Multi-Nanoshells

Journal:

Plasmonics

Summary:

Abstract The polarization properties of the local electric
field in the gold–dielectric–gold multilayer nanoshells are
investigated by theoretical calculation based on the quasistatic
approximation. The calculation results show that the
complete polarized incident light does not only stimulate the
same directional polarized local electric field. The polarized
angle of the local field may changes from 0° to 90° as the
wavelength and location are changed. The distributions of
local field polarization are different in dielectric layer or
gold shell and display different features in different plasmonic
hybridization mode. As the incident wavelength is
increased, the hot spot of polarizing angle moves monotonously
in the middle dielectric shell, whereas moves
nonmonotonously in the gold shell and surrounding environment.
In the gold shell, the gap between hot spots of
polarizing angle may occur at the resonance frequency.
However, the hot spots of polarizing angle always occur at
the resonance frequencies in the surrounding environment.
These interesting results show that the single-molecule detection
based on metal nanostructure induced surfaceenhanced
Raman scattering and surface enhanced fluorescence
could be optimized by adjusting the incident light
polarization and frequency.
Plasmonics (2013) 8:417–424

Co-author:

Jian Zhu, Jian-Jun Li, Jun-Wu Zhao

Translation or Not:

No

Date of Publication:

2013-05-10