Dipole emission characteristics near a topological insulator sphere coated with a metallic nanoshell
Autor: | P.T. Leung, Huai-Yi Xie, Railing Chang |
---|---|
Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
010302 applied physics
Topological insulator Materials science Long wavelength limit General Physics and Astronomy Resonance 02 engineering and technology Coupled plasmonic resonances 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics Nanoshell lcsh:QC1-999 Dipole emitters Dipole 0103 physical sciences 0210 nano-technology Multipole expansion Axion Plasmon lcsh:Physics |
Zdroj: | Results in Physics, Vol 23, Iss, Pp 104014-(2021) |
ISSN: | 2211-3797 |
Popis: | The modified emission characteristics of a source dipole near a metal-coated topological insulator sphere are studied with the application of axion electrodynamics in the long wavelength limit. Our focus is on the effect due to the topological magneto-electric (TME) response of the sphere and its influence on the multipolar plasmonic resonance of the metallic nanoshell. It is found that the TME response mainly affects the bonding modes of the metal shell plasmons with the lower order multipole resonances experiencing appreciable red-shifts. In addition, the TME effects can lead to either greater or smaller decay rates and lower emission frequencies, depending crucially on the frequency of the emitting dipole; but otherwise rather insensitive to the orientation of the dipole moments. These findings thus provide an alternative approach to probing the TME effects via molecular fluorescence experiments, as well as new possibility of controlling the emission properties of molecules using these novel nanoparticles. |
Databáze: | OpenAIRE |
Externí odkaz: |