Adiabatic dynamics of edge waves in photonic graphene

Ablowitz, Mark, Curtis, Christopher and Ma, Yi-Ping (2015) Adiabatic dynamics of edge waves in photonic graphene. 2D Materials, 2 (2). 024003. ISSN 2053-1583

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Official URL: http://dx.doi.org/10.1088/2053-1583/2/2/024003

Abstract

The propagation of localized edge modes in photonic honeycomb lattices, formed from an array of adiabatically varying periodic helical waveguides, is considered. Asymptotic analysis leads to an explicit description of the underlying dynamics. Depending on parameters, edge states can exist over an entire period or only part of a period; in the latter case an edge mode can effectively disintegrate and scatter into the bulk. In the presence of nonlinearity, a 'time'-dependent one-dimensional nonlinear Schrödinger (NLS) equation describes the envelope dynamics of edge modes. When the average of the 'time varying' coefficients yields a focusing NLS equation, soliton propagation is exhibited. For both linear and nonlinear systems, certain long lived traveling modes with minimal backscattering are found; they exhibit properties of topologically protected states.

Item Type: Article
Subjects: F200 Materials Science
F300 Physics
G100 Mathematics
Department: Faculties > Engineering and Environment > Mathematics and Information Sciences
Depositing User: Yi-Ping Ma
Date Deposited: 22 Nov 2016 11:11
Last Modified: 17 May 2017 22:43
URI: http://nrl.northumbria.ac.uk/id/eprint/28406

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