Non-spreading Bessel spatiotemporal optical vortices

• 作者: Qian Cao Jian Chen Keyin Lu Chenhao Wan Andy Chong Qiwen Zhan
• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: ARTICLES
• 页码范围: 133-140
• 页数: 8页
• 语种: 英文

摘要

Non-spreading nature of Bessel spatiotemporal wavepackets is theoretically and experimentally investi-gated and orders of magnitude improvement in the spatiotemporal spreading has been demonstrated.The spatiotemporal confinement provided by the Bessel spatiotemporal wavepacket is further exploited to transport transverse orbital angular momentum through embedding spatiotemporal optical vortex into the Bessel spatiotemporal wavepacket,constructing a new type of wavepacket:Bessel spatiotempo-ral optical vortex.Both numerical and experimental results demonstrate that spatiotemporal vortex structure can be well maintained and confined through much longer propagation.High order spatiotem-poral optical vortices can also be better confined in the spatiotemporal domain and prevented from fur-ther breaking up,overcoming a potential major obstacle for future applications of spatiotemporal vortex.