Topological Magnetoelectric Effect as Probed by Nanoshell Plasmonic Modes

Authors

Railing Chang, National Taiwan Ocean UniversityFollow
Huai Yi Xie, Institute of Nuclear Energy Research, Atomic Energy Council, Executive Yuan, Taoyuan, TaiwanFollow
Ya-Chih Wang, National Taiwan Ocean University
Hai-Pang Chiang, National Taiwan Ocean UniversityFollow
P.T. Leung, Portland State UniversityFollow

Published In

Results in Physics

Document Type

Article

Publication Date

12-2019

Subjects

Topological insulator, Surface plasmon resonance, Plasmons (Physics)

Abstract

Axion electrodynamics is applied to study the response of a plasmonic nanoshell with a core made of topological insulator (TI) materials. The electric polarizability of such a system is calculated in the long wavelength limit via the introduction of two scalar potentials satisfying the various appropriate boundary conditions. Our focus is on the topological magneto-electric effect (TME) as manifested in the coupled plasmonic resonances of the nanoshell. It is found that for a TI with broken time-reversal symmetry, such TME will lead to observable red-shifts in the coupled plasmonic modes, with more significant manifestation of such shifts for the bonding modes of a metallic nanoshell. It is speculated that such universal red-shift could be a manifestation of the fundamental dual symmetry as generalized for axion electrodynamics.

Description

© 2019 Published by Elsevier Inc. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

Locate the Document

https://doi.org/10.1016/j.rinp.2019.102744

DOI

10.1016/j.rinp.2019.102744

Persistent Identifier

https://archives.pdx.edu/ds/psu/30883

Citation Details

Chang, R., Xie, H. Y., Wang, Y. C., Chiang, H. P., & Leung, P. T. (2019). Topological magnetoelectric effect as probed by nanoshell plasmonic modes. Results in Physics, 15, 102744.