期刊
OPTICS LETTERS
卷 40, 期 20, 页码 4635-4638出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.40.004635
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- Air Force Office of Scientific Research (AFOSR) [FA9550-12-1-0207]
- National Science Foundation (NSF) [CHE 1125935, DMS-1310200]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1125935] Funding Source: National Science Foundation
- Division Of Mathematical Sciences
- Direct For Mathematical & Physical Scien [1310200] Funding Source: National Science Foundation
The propagation of linear and nonlinear edge modes in bounded photonic honeycomb lattices formed by an array of rapidly varying helical waveguides is studied. These edge modes are found to exhibit strong transmission (reflection) around sharp corners when the dispersion relation is topologically nontrivial (trivial). An asymptotic theory is developed that establishes the presence (absence) of typical edge states, including, in particular, armchair and zigzag edge states in the topologically nontrivial (trivial) case. In the presence of topological protection, nonlinear edge solitons can persist over very long distances. (C) 2015 Optical Society of America
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