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Ling CW, Xiao M, Chan CT, et al. Topological edge plasmon modes between diatomic chains of plasmonic nanoparticles. Opt Express. 2015;23(3):2021-31doi: 10.1364/OE.23.002021.
Ling, C. W., Xiao, M., Chan, C. T., Yu, S. F., & Fung, K. H. (2015). Topological edge plasmon modes between diatomic chains of plasmonic nanoparticles. Optics express, 23(3), 2021-31. https://doi.org/10.1364/OE.23.002021
Ling, C W, et al. "Topological edge plasmon modes between diatomic chains of plasmonic nanoparticles." Optics express vol. 23,3 (2015): 2021-31. doi: https://doi.org/10.1364/OE.23.002021
Ling CW, Xiao M, Chan CT, Yu SF, Fung KH. Topological edge plasmon modes between diatomic chains of plasmonic nanoparticles. Opt Express. 2015 Feb 09;23(3):2021-31. doi: 10.1364/OE.23.002021. PMID: 25836073.
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Opt Express. 2015 Feb 09;23(3):2021-31. doi: 10.1364/OE.23.002021.

Topological edge plasmon modes between diatomic chains of plasmonic nanoparticles.

Optics express

C W Ling, Meng Xiao, C T Chan, S F Yu, K H Fung

PMID: 25836073 DOI: 10.1364/OE.23.002021

Abstract

We study the topological edge plasmon modes between two "diatomic" chains of identical plasmonic nanoparticles. Zak phase for longitudinal plasmon modes in each chain is calculated analytically by solutions of macroscopic Maxwell's equations for particles in quasi-static dipole approximation. This approximation provides a direct analogy with the Su-Schrieffer-Heeger model such that the eigenvalue is mapped to the frequency dependent inverse-polarizability of the nanoparticles. The edge state frequency is found to be the same as the single-particle resonance frequency, which is insensitive to the separation distances within a unit cell. Finally, full electrodynamic simulations with realistic parameters suggest that the edge plasmon mode can be realized through near-field optical spectroscopy.

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