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Title: Reconfigurable topological phases in next-nearest-neighbor coupled resonator lattices
Authors: Leykam, Daniel
Mittal, S.
Hafezi, M.
Chong, Yi Dong
Keywords: Lattices
Topological Photonic System
Issue Date: 2018
Source: Leykam, D., Mittal, S., Hafezi, M., & Chong, Y. D. (2018). Reconfigurable topological phases in next-nearest-neighbor coupled resonator lattices. Physical Review Letters, 121(2), 023901-.
Series/Report no.: Physical Review Letters
Abstract: We present a reconfigurable topological photonic system consisting of a 2D lattice of coupled ring resonators, with two sublattices of site rings coupled by link rings, which can be accurately described by a tight-binding model. Unlike previous coupled-ring topological models, the design is translationally invariant, similar to the Haldane model, and the nontrivial topology is a result of next-nearest couplings with nonzero staggered phases. The system exhibits a topological phase transition between trivial and spin Chern insulator phases when the sublattices are frequency detuned. Such topological phase transitions can be easily induced by thermal or electro-optic modulators, or nonlinear cross phase modulation. We use this lattice to design reconfigurable topological waveguides, with potential applications in on-chip photon routing and switching.
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.121.023901
Rights: © 2018 American Physical Society. This paper was published in Physical Review Letters and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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