Generation of robust spatiotemporal optical vortices with transverse orbital angular momentum beyond $10^2$
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.
Keywords
Cite
@article{arxiv.2108.13185,
title = {Generation of robust spatiotemporal optical vortices with transverse orbital angular momentum beyond $10^2$},
author = {Wei Chen and Wang Zhang and Yuan Liu and Fan-Chao Meng and John M. Dudley and Yan-Qing Lu},
journal= {arXiv preprint arXiv:2108.13185},
year = {2024}
}