Nonlinear Switch and Spatial Lattice Solitons of Photonic s-p Orbitals
arXiv:2408.03250 · doi:10.1364/OL.546876
Abstract
We develop fs laser-fabricated asymmetric couplers and zig-zag arrays consisting of single and two-mode waveguides with bipartite nonlinearity. The fundamental mode ( orbital) is near resonance with the neighboring higher-order orbital, causing efficient light transfer at low power. Due to Kerr nonlinearity, the coupler works as an all-optical switch between and orbitals. Single- and double-peak spatial solitons of - orbitals form in the lattice due to the bipartite nature of the on-site nonlinearity. We probe highly localized bulk and edge solitons, peaked at the and orbitals, spectrally residing in the photonic band gap. Our work will be important for exploring inter-orbital couplings and nonlinear interactions in intricate photonic devices.
arXiv comment4 pages, 7 figures and supplementary information
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