Spectral tunneling of lattice nonlocal solitons
arXiv:1006.3401 · doi:10.1103/PhysRevA.82.013806
Abstract
We address spectral tunneling of walking spatial solitons in photorefractive media with nonlocal diffusion of the nonlinear response and an imprinted shallow optical lattice. In contrast to materials with local nonlinearities, where solitons travelling across the lattice close to the Bragg angle suffer large radiative losses, in photorefractive media with diffusion nonlinearity resulting in self-bending solitons survive when their propagation angle approaches and even exceeds the Bragg angle. In the spatial frequency domain this effect can be considered as tunneling through the band of spatial frequencies centered around the Bragg frequency where the spatial group velocity dispersion is positive.
arXiv comment12 pages, 3 figures, to appear in Physical Review A
References in corpus (5)
- Propagation of matter wave solitons in periodic and random nonlinear potentials
- Nonlinear Bloch-wave interaction and Bragg scattering in optically-induced lattices
- Gap solitons supported by optical lattices in photorefractive crystals with asymmetric nonlocality
- Soliton switching and Bloch-wave filtering in periodic photonic lattices
- Bragg-type soliton mirror