Nontrivial Bloch oscillations in waveguide arrays with second-order coupling
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Updated: Jun 12, 2026

Fabrication and Testing of Microfluidic Optomechanical Oscillators
Published on: May 29, 2014
Gang Wang1, Ji Ping Huang, Kin Wah Yu
1Department of Physics, State Key Laboratory of Surface Physics, and Key Laboratory of Micro and NanoPhotonic Structures (Ministry of Education), Fudan University, Shanghai, China. 071019009@fudan.edu.cn
Abstract:
Under the influence of the next-nearest-neighbor interaction, we theoretically investigate the occurrence of Bloch oscillations in zigzag waveguide arrays. Because of the special topological configuration of the lattice itself, the second-order coupling (SOC) can be enhanced significantly and leads to the band alteration beyond the nearest-neighbor model, i.e., the offset of minimum value from the band edge. Contrary to the behavior in the vanishing SOC, the oscillation patterns exhibit new features, namely, a double turning-back occurs when the beam approaches the band edge. Our results can be applied to some ordered-lattice systems.
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