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arXiv · 2402.07794

Tailoring spatiotemporal wavepackets via two-dimensional space-time duality

Wei Chen·Anzhuo Yu·Zhou Zhou·Lingling Ma·Zeyu Wang·Jiachen Yang·Chengwei Qiu·Yanqing Lu
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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.

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Wei Chen, Anzhuo Yu, Zhou Zhou, Lingling Ma, Zeyu Wang, Jiachen Yang, Chengwei Qiu, Yanqing Lu. 2024-02-12. Tailoring spatiotemporal wavepackets via two-dimensional space-time duality. https://arxiv.org/abs/2402.07794

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