Robust ultrashort light bullets in strongly twisted waveguide arrays
arXiv:1909.04372 · doi:10.1103/PhysRevLett.123.133902
Abstract
We introduce a new class of stable light bullets that form in twisted waveguide arrays pumped withultrashort pulses, where twisting offers a powerful knob to tune the properties of localized states.We find that above a critical twist, three-dimensional wavepackets are unambiguously stabilized,with no minimum energy threshold. As a consequence, when the higher order perturbations thataccompany ultrashort pulse propagation are at play, the bullets dynamically adjust and sweep alongstable branches. Therefore, they are predicted to feature an unprecedented experimental robustness.
arXiv comment6 pages, 5 figures (to appear in Physical Review Letters)
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