Bloch oscillations in arrays of helical waveguides
arXiv:1806.02061 · doi:10.1103/PhysRevA.97.063845
Abstract
We study optical Bloch oscillations in the one- and two-dimensional arrays of helical waveguides with transverse refractive index gradient. Longitudinal rotation of waveguides may lead to notable variations of the width of the band of quasi-energies and even its complete collapse for certain radii of the helix. This drastically affects the amplitude and direction of Bloch oscillations. Thus, they can be completely arrested for certain helix radii or their direction can be reversed. If the array of helical waveguides is truncated and near-surface waveguide is excited, helix radius determines whether periodic Bloch oscillations persist or replaced by the irregular near-surface oscillations.
arXiv comment6 pages, 5 figures, this manuscript has been accepted for publication as a Regular Article in Physical Review A
References in corpus (12)
- Photonic Floquet Topological Insulators
- Bloch oscillations and mean-field effects of Bose-Einstein condensates in 1-D optical lattices
- Light propagation and localization in modulated photonic lattices and waveguides
- Observation of dynamic localization in periodically-curved waveguide arrays
- Photonic Bloch oscillations and Zener tunneling in two-dimensional optical lattices
- Fractional Bloch oscillations in photonic lattices
- Observation of Bloch oscillations in complex PT-symmetric photonic lattices
- Inhibition of light tunneling in waveguide arrays
- Landau-Zener Bloch oscillations with perturbed flat bands
- Resonant mode flopping in modulated waveguiding structures
- Observation of robust flat-band localization in driven photonic rhombic lattices
- Light tunneling inhibition and anisotropic diffraction engineering in two-dimensional waveguide arrays