It was not until 1992 did scientists realize that light beams with a helical phase carry orbital angular momentum(OAM)[1].The discovery of optical OAM has spurred a wealth of applications such as high-speed optical co...It was not until 1992 did scientists realize that light beams with a helical phase carry orbital angular momentum(OAM)[1].The discovery of optical OAM has spurred a wealth of applications such as high-speed optical communications,optical spanners and spinorbit angular momentum coupling[2-4].To date,the majority of OAM beams are temporally static,i.e.,the OAM does not vary in time.Recently,Rego et al.[5]generated extreme-ultraviolet selftorqued beams in high-harmonic generation driven by timedelayed pulses that differ by one unit of OAM.The temporal OAM variation could potentially be utilized to manipulate nanostructures and launch chiral excitations on ultrafast time scales[6].展开更多
We report the experimental and theoretical investigation of tilted spatiotemporal optical vortices with partial temporal coherence.The theoretical study shows that the instantaneous spatiotemporal optical vortex is wi...We report the experimental and theoretical investigation of tilted spatiotemporal optical vortices with partial temporal coherence.The theoretical study shows that the instantaneous spatiotemporal optical vortex is widely variable with the statistical orbital angular momentum(OAM)direction.While decreasing temporal coherence results in a larger variability of OAM tilt,the average OAM direction is relatively unchanged.展开更多
基金the National Natural Science Foundation of China(NSFC)(61875245)the support from NSFC(61805142)Shanghai Science and Technology Committee(19060502500)。
文摘It was not until 1992 did scientists realize that light beams with a helical phase carry orbital angular momentum(OAM)[1].The discovery of optical OAM has spurred a wealth of applications such as high-speed optical communications,optical spanners and spinorbit angular momentum coupling[2-4].To date,the majority of OAM beams are temporally static,i.e.,the OAM does not vary in time.Recently,Rego et al.[5]generated extreme-ultraviolet selftorqued beams in high-harmonic generation driven by timedelayed pulses that differ by one unit of OAM.The temporal OAM variation could potentially be utilized to manipulate nanostructures and launch chiral excitations on ultrafast time scales[6].
基金supported by the National Research Foundation of Korea(NRF)funded by the Korea government(MSIT)(No.2022R1A2C1091890).
文摘We report the experimental and theoretical investigation of tilted spatiotemporal optical vortices with partial temporal coherence.The theoretical study shows that the instantaneous spatiotemporal optical vortex is widely variable with the statistical orbital angular momentum(OAM)direction.While decreasing temporal coherence results in a larger variability of OAM tilt,the average OAM direction is relatively unchanged.
