Ultrafast control of vortex microlasers
Ultrafast control of vortex microlasers
复制标题
DOI：
10.1126/science.aba4597
复制
发表时间：
2020-02-28
期刊：
影响因子：
56.9
通讯作者：
Song, Qinghai
中科院分区：
文献类型：
--
作者：
Huang, Can;Zhang, Chen;Song, Qinghai
经典和量子信息处理技术的发展要求片上集成结构光源。虽然集成涡旋微激光器以前已经被证明，但它们仍然是静态的，并且具有相对较高的激光阈值，使它们不适合高速光通信和计算。我们介绍了钙钛矿基涡旋微激光器，并展示了它们在室温超快全光开关中的应用。通过利用模式对称性和远场特性，我们揭示了涡旋光束激光可以切换到线性偏振光束激光，反之亦然，切换时间为1至1.5皮秒和能量消耗的数量级低于以前证明的全光开关。我们的研究结果提供了一种方法，打破了长期以来在低能耗和高速纳米光子学之间的权衡，引入了在太赫兹频率下可切换的涡旋微激光器。
The development of classical and quantum information-processing technology calls for on-chip integrated sources of structured light. Although integrated vortex microlasers have been previously demonstrated, they remain static and possess relatively high lasing thresholds, making them unsuitable for high-speed optical communication and computing. We introduce perovskite-based vortex microlasers and demonstrate their application to ultrafast all-optical switching at room temperature. By exploiting both mode symmetry and far-field properties, we reveal that the vortex beam lasing can be switched to linearly polarized beam lasing, or vice versa, with switching times of 1 to 1.5 picoseconds and energy consumption that is orders of magnitude lower than in previously demonstrated all-optical switching. Our results provide an approach that breaks the long-standing trade-off between low energy consumption and high-speed nanophotonics, introducing vortex microlasers that are switchable at terahertz frequencies.