Tailoring spatiotemporal wavepackets via two-dimensional space-time duality
Abstract
Space-time (ST) beams, ultrafast optical wavepackets with customized spatial and temporal characteristics, present a significant contrast to conventional spatial-structured light and hold the potential to revolutionize our understanding and manipulation of light. However, the progress in ST beam research has been constrained by the absence of a universal framework for their analysis and generation. Here, we introduce the concept of "two-dimensional ST duality", establishing a foundational duality between spatial-structured light and ST beams. We show that breaking the exact balance between paraxial diffraction and narrow-band dispersion is crucial for guiding the dynamics of ST wavepackets. Leveraging this insight, we pioneer a versatile complex-amplitude modulation strategy, enabling the precise crafting of ST beams with an exceptional fidelity exceeding 97%. Furthermore, we uncover a new range of ST wavepackets by harnessing the exact one-to-one relationship between scalar spatial-structured light and ST beams. Our findings suggest a paradigm shift opportunity in ST beam research and may apply to a broader range of wave physics systems.
Cite
@article{arxiv.2402.07794,
title = {Tailoring spatiotemporal wavepackets via two-dimensional space-time duality},
author = {Wei Chen and Anzhuo Yu and Zhou Zhou and Lingling Ma and Zeyu Wang and Jiachen Yang and Chengwei Qiu and Yanqing Lu},
journal= {arXiv preprint arXiv:2402.07794},
year = {2024}
}