| Autor: |
Railing Chang, Huai-Yi Xie, Ya-Chih Wang, Hai-Pang Chiang, P.T. Leung |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
Results in Physics, Vol 15, Iss , Pp - (2019) |
| Druh dokumentu: |
article |
| ISSN: |
2211-3797 |
| DOI: |
10.1016/j.rinp.2019.102744 |
| Popis: |
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. Keywords: Surface plasmons, Axion electrodynamics, Topological insulator, Nanoshells |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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