Spatiotemporal control of high-intensity laser pulses with a plasma lens
Physical Review Research(2023)
摘要
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.
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