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Title: Nonlinear Bloch wave dynamics in photonic Aharonov-Bohm cages
Authors: Chang, Nana
Gundogdu, Sinan
Leykam, Daniel 
Angelakis, Dimitris G. 
Kou, SuPeng
Flach, Sergej
Maluckov, Aleksandra
Issue Date: 1-Mar-2021
Publisher: American Institute of Physics Inc.
Citation: Chang, Nana, Gundogdu, Sinan, Leykam, Daniel, Angelakis, Dimitris G., Kou, SuPeng, Flach, Sergej, Maluckov, Aleksandra (2021-03-01). Nonlinear Bloch wave dynamics in photonic Aharonov-Bohm cages. APL Photonics 6 (3) : 308011. ScholarBank@NUS Repository.
Rights: Attribution 4.0 International
Abstract: We study the properties of nonlinear Bloch waves in a diamond chain waveguide lattice in the presence of a synthetic magnetic flux. In the linear limit, the lattice exhibits a completely flat (wavevector k-independent) band structure, resulting in perfect wave localization, known as Aharonov-Bohm caging. We find that in the presence of nonlinearity, the Bloch waves become sensitive to k, exhibiting bifurcations and instabilities. Performing numerical beam propagation simulations using the tight-binding model, we show how the instabilities can result in either the spontaneous or controlled formation of localized modes, which are immobile and remain pinned in place due to the synthetic magnetic flux. © 2021 Author(s.
Source Title: APL Photonics
ISSN: 2378-0967
DOI: 10.1063/5.0037767
Rights: Attribution 4.0 International
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