ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain.
Institut Universitari de Matemàtica Pura i Aplicada, Universitat Politècnica de València, 46022 (València), Spain.
Phys Rev Lett. 2019 Sep 27;123(13):133902. doi: 10.1103/PhysRevLett.123.133902.
We introduce a new class of stable light bullets that form in twisted waveguide arrays pumped with ultrashort pulses, where twisting offers a powerful knob to tune the properties of localized states. We find that, above a critical twist, three-dimensional wave packets are unambiguously stabilized, with no minimum energy threshold. As a consequence, when the higher-order perturbations that accompany ultrashort pulse propagation are at play, the bullets dynamically adjust and sweep along stable branches. Therefore, they are predicted to feature an unprecedented experimental robustness.
我们介绍了一类新的稳定光子弹，它们在超短脉冲泵浦的扭曲波导阵列中形成，其中扭曲提供了一个强大的旋钮来调整局域态的性质。我们发现，在超过临界扭曲时，三维波包被明确地稳定下来，没有最小能量阈值。因此，当伴随超短脉冲传播的高阶微扰起作用时，子弹会动态地调整并沿着稳定的分支扫描。因此，它们预计具有前所未有的实验鲁棒性。
