(3+1)-dimensional Pearcey-Gaussian wave packet with arbitrary velocity driven by flying focus

The group velocity (GV) modulation of space-time wave packets (STWPs) along the transverse and longitudinal directions in free space is constrained by various factors. To surmount this limitation, a technique called "flying focus" has been developed, which enables the generation of laser p...

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Bibliographic Details
Published in:Optics letters 2024-01, Vol.49 (2), p.290-293
Main Authors: Luo, Yingjun, Liang, ZeHong, Mo, ZhenWu, Shi, Jingyi, Huang, JingHuan, Yang, YongZheng, Lin, XiaoJun, Ruan, Zhang, Wang, Cen, Ouyang, Min, Deng, DongMei
Format: Article
Language:English
Subjects:
Flight
Group velocity
Superluminal propagation
Wave packets
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Summary:The group velocity (GV) modulation of space-time wave packets (STWPs) along the transverse and longitudinal directions in free space is constrained by various factors. To surmount this limitation, a technique called "flying focus" has been developed, which enables the generation of laser pulses with dynamic focal points that can propagate at arbitrary velocities independent of GV. In this Letter, we propose a (3+1)-dimensional Pearcey-Gauss wave packet based on the "flying focus" technique, which exhibits superluminal propagation, transverse focus oscillation, and longitudinal periodic autofocusing. By selecting appropriate parameters, we can flexibly manipulate the position, the size, and the number of focal points- or make the wave packet follow a desired trajectory. This work may pave the way for the advancement of space-time structured light fields.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.514338