Robust ultrashort light bullets in strongly twisted waveguide arrays

TL;DR

This paper introduces a new class of stable, ultrashort light bullets in twisted waveguide arrays, demonstrating that twisting stabilizes three-dimensional wavepackets without energy thresholds, enhancing their robustness.

Contribution

The study reveals that twisting waveguide arrays can stabilize ultrashort light bullets, enabling dynamic adjustment and unprecedented robustness in three-dimensional localized states.

Findings

Stable light bullets form in twisted waveguide arrays.

Twisting stabilizes wavepackets above a critical threshold.

Bullets can dynamically adjust and are highly robust.

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.