Space-time wave packets with both arbitrary transverse and longitudinal accelerations

Liang, Zehong; Ye-jin, Liu; Luo, YingJun; Hechong, Chen; Deng, Dongmei

doi:10.1364/ol.486345

Opt. Lett.

2023

DOI: 10.1364/ol.486345

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Space-time wave packets with both arbitrary transverse and longitudinal accelerations

Zehong Liang

Liu Ye-jin

YingJun Luo

et al.

Abstract: The group velocity in the free space of space-time wave packets (STWPs) and light bullets can be flexibly regulated by many advanced strategies; however, these regulations are restricted to only the longitudinal group velocity. In this work, a computational model based on catastrophe theory is proposed, to devise STWPs with both arbitrary transverse and longitudinal accelerations. In particular, we investigate the attenuation-free Pearcey–Gauss STWP, which enriches the family of non-diffracting STWPs. This wor… Show more

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Cited by 5 publications

References 29 publications

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Dephasingless two-color terahertz generation

Simpson,

Pigeon,

Miller

et al. 2024

Sci Rep

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A laser pulse composed of a fundamental and an appropriately phased second harmonic can drive a time-dependent current of photoionized electrons that generates broadband THz radiation. Over the propagation distances relevant to many experiments, dispersion causes the relative phase between the harmonics to evolve. This “dephasing” slows the accumulation of THz energy and results in a multi-cycle THz pulse with significant angular dispersion. Here, we introduce a novel optical configuration that compensates the relative phase evolution, allowing for the formation of a half-cycle THz pulse with almost no angular dispersion. The configuration uses the spherical aberration of an axilens to map a prescribed radial phase variation in the near field to a desired longitudinal phase variation in the far field. Simulations that combine this configuration with an ultrashort flying focus demonstrate the formation of a half-cycle THz pulse with a controlled emission angle and 1/4 the angular divergence of the multi-cycle pulse created by a conventional optical configuration.

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Dephasingless two-color terahertz generation

Simpson,

Pigeon,

Miller

et al. 2024

Sci Rep

View full text Add to dashboard Cite

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Spatiotemporal control of high-intensity laser pulses with a plasma lens

Li,

Miller,

Pierce

et al. 2024

Phys. Rev. Research

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Spatiotemporal control encompasses a variety of techniques for producing laser pulses with dynamic intensity peaks that move independently of the group velocity. This controlled motion of the intensity peak offers a new approach to optimizing laser-based applications and enhancing signatures of fundamental phenomena. Here, we demonstrate spatiotemporal control with a plasma optic. A chirped laser pulse focused by a plasma lens exhibits a moving focal point, or “flying focus,” that can travel at an arbitrary, predetermined velocity. Unlike currently used conventional or adaptive optics, a plasma lens can be located close to the interaction region and can operate at an orders of magnitude higher, near-relativistic intensity. Published by the American Physical Society 2024

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Programmable-trajectory ultrafast flying focus pulses

Ambat¹,

Shaw²,

Pigeon³

et al. 2023

Opt. Express

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“Flying focus” techniques produce laser pulses with dynamic focal points that travel distances much greater than a Rayleigh length. The implementation of these techniques in laser-based applications requires the design of optical configurations that can both extend the focal range and structure the radial group delay. This article describes a method for designing optical configurations that produce ultrashort flying focus pulses with programmable-trajectory focal points. The method is illustrated by several examples that employ an axiparabola for extending the focal range and either a reflective echelon or a deformable mirror-spatial light modulator pair for structuring the radial group delay. The latter configuration enables rapid exploration and optimization of flying foci, which could be ideal for experiments.

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Space-time wave packets with both arbitrary transverse and longitudinal accelerations

Cited by 5 publications

References 29 publications

Dephasingless two-color terahertz generation

Dephasingless two-color terahertz generation

Spatiotemporal control of high-intensity laser pulses with a plasma lens

Programmable-trajectory ultrafast flying focus pulses

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