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- Title
Spatiotemporal optical vortices with controllable radial and azimuthal quantum numbers.
- Authors
Liu, Xin; Cao, Qian; Zhang, Nianjia; Chong, Andy; Cai, Yangjian; Zhan, Qiwen
- Abstract
Optical spatiotemporal vortices with transverse photon orbital angular momentum (OAM) have recently become a focal point of research. In this work we theoretically and experimentally investigate optical spatiotemporal vortices with radial and azimuthal quantum numbers, known as spatiotemporal Laguerre-Gaussian (STLG) wavepackets. These 3D wavepackets exhibit phase singularities and cylinder-shaped edge dislocations, resulting in a multi-ring topology in its spatiotemporal profile. Unlike conventional ST optical vortices, STLG wavepackets with non-zero p and l values carry a composite transverse OAM consisting of two directionally opposite components. We further demonstrate mode conversion between an STLG wavepacket and an ST Hermite-Gaussian (STHG) wavepacket through the application of strong spatiotemporal astigmatism. The converted STHG wavepacket is de-coupled in intensity in space-time domain that can be utilized to implement the efficient and accurate recognition of ultrafast STLG wavepackets carried various p and l. This study may offer new insights into high-dimensional quantum information, photonic topology, and nonlinear optics, while promising potential applications in other wave phenomena such as acoustics and electron waves. The authors demonstrate the experimental generation and mode conversion of spatiotemporal Laguerre/Hermite-Gaussian wavepackets with controllable dual quantum numbers by imprinting two-dimensional complex modulation onto the spectrum of ultrashort laser pulses, opening new possibilities for spatiotemporally sculpturing of light.
- Subjects
ULTRASHORT laser pulses; QUANTUM numbers; OPTICAL vortices; ANGULAR momentum (Mechanics); ULTRA-short pulsed lasers; NONLINEAR optics; EDGE dislocations
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-49819-4