Generation of robust spatiotemporal optical vortices with transverse orbital angular momentum beyond
arXiv:2108.13185 · doi:10.1038/s41467-022-31623-7
Abstract
Recently, photons have been observed to possess transverse orbital angular momentum (OAM); however, it is unclear as whether they can hold a transverse OAM higher than 1. Here, we theoretically and experimentally demonstrate that high-order spatiotemporal Bessel optical vortices (STBOVs) can stably carry transverse OAM even beyond . Through the inverse design of the spiral phase, an STBOV of any order can be controllably generated using a 4f pulse shaper. In contrast to conventional longitudinal OAM, the vector direction of the transverse OAM can be distinguished by the unique time-symmetrical evolution of STBOVs. More interestingly, the stability of STBOVs improves with their increasing orders owing to enhanced space-time coupling, making these beams particularly suitable for the generation of ultra-high transverse OAM. Our work paves the way for further research and application of this unique OAM of photons.
References in corpus (13)
- Electromagnetic Angular Momentum
- Electromagnetic Force and Momentum
- Quantum spin Hall effect of light
- Semiclassical Dynamics of Electron Wave Packet States with Phase Vortices
- Diffraction-free space-time beams
- Quantum entanglement of angular momentum states with quantum numbers up to 10010
- Spatio-temporal vortex beams and angular momentum
- Spatiotemporal Vortex Pulses: Angular Momenta and Spin-Orbit Interaction
- Second-harmonic generation and the conservation of spatiotemporal orbital angular momentum of light
- Transverse spinning of unpolarized light
- Mode structure and orbital angular momentum of spatiotemporal optical vortex (STOV) pulses
- Photonic orbital angular momentum with controllable orientation
- Spin-orbit interactions of transverse sound