期刊
SCIENCE BULLETIN
卷 67, 期 2, 页码 133-140出版社
ELSEVIER
DOI: 10.1016/j.scib.2021.07.031
关键词
Optical vortices; Bessel spatiotemporal wavepacket; Orbital angular momentum; Spatiotemporal vortex
资金
- National Natural Science Foundation of China [92050202, 61805142, 61875245]
- Shanghai Science and Technology Committee [19060502500]
- Shanghai Natural Science Foundation [20ZR1437600]
The non-spreading nature of Bessel spatiotemporal wavepackets has been investigated both theoretically and experimentally, showing significant improvement in spatiotemporal spreading. By embedding spatiotemporal optical vortices into Bessel spatiotemporal wavepackets, transverse orbital angular momentum can be transported, creating a new type of wavepacket. Experimental results demonstrate that the spatiotemporal vortex structures can be well maintained and confined, overcoming potential obstacles for future applications.
Non-spreading nature of Bessel spatiotemporal wavepackets is theoretically and experimentally investigated 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 spatiotemporal optical vortex. Both numerical and experimental results demonstrate that spatiotemporal vortex structure can be well maintained and confined through much longer propagation. High order spatiotemporal optical vortices can also be better confined in the spatiotemporal domain and prevented from further breaking up, overcoming a potential major obstacle for future applications of spatiotemporal vortex. (c) 2021 Science China Press. Published by Elsevier B.V. and Science China Press. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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