Nonlinear Bloch wave dynamics in photonic Aharonov–Bohm cages
| Autor: | Sergej Flach, Nana Chang, SuPeng Kou, Aleksandra Maluckov, Dimitris G. Angelakis, Sinan Gundogdu, Daniel Leykam |
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| Rok vydání: | 2021 |
| Předmět: |
lcsh:Applied optics. Photonics
Physics Condensed matter physics Computer Networks and Communications Synthetic Gauge Field Photonics lcsh:TA1501-1820 01 natural sciences Atomic and Molecular Physics and Optics Magnetic flux law.invention 010309 optics Lattice (module) Nonlinear system law 0103 physical sciences Wave vector Gauge field theory 010306 general physics Electronic band structure Bloch waves Diamond chain Waveguide Beam (structure) Bloch wave |
| Zdroj: | APL Photonics, Vol 6, Iss 3, Pp 030801-030801-8 (2021) APL Photonics |
| ISSN: | 2378-0967 |
| Popis: | Summarization: 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. Presented on: APL Photonics |
| Databáze: | OpenAIRE |
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