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Title: Spatiotemporal control of laser intensity

Journal Article · · Nature Photonics

The controlled coupling of a laser to a plasma has the potential to address grand scientific challenges including reaching the Schwinger limit, developing compact free electron lasers, extending linear colliders to TeV energies, and generating novel light sources for probing electron dynamics within molecules. Currently, many such applications have limited flexibility and poor control over the laser focal volume. Here we present an advanced focusing scheme called a “flying focus” where a chromatic focusing system combined with chirped laser pulses enables a small–diameter laser focus to propagate nearly 100 times its Rayleigh length, while decoupling the speed at which the peak intensity moves from its group velocity. This unprecedented spatiotemporal control over the laser focal volume allows the laser focus to co- or counter–propagate along its axis at any velocity. Experiments validating the concept measured subluminal (-0.09c) to superluminal (39c) focal spot velocities generating a nearly constant peak intensity over 4.5 mm.

Research Organization:
Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
NA0001944; SC0016253
OSTI ID:
1437582
Report Number(s):
2017-173; 13-98; PII: 121; TRN: US1900343
Journal Information:
Nature Photonics, Vol. 12, Issue 5; ISSN 1749-4885
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 108 works
Citation information provided by
Web of Science

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Cited By (20)

Optical space-time wave packets having arbitrary group velocities in free space journal February 2019
Cascaded chirped photon acceleration for efficient frequency conversion journal May 2018
Flying focus: Spatial and temporal control of intensity for laser-based applications journal March 2019
Stimulated Raman backscattering amplification with a low-intensity pump journal October 2019
Laser frequency upconversion in plasmas with finite ionization rates journal August 2019
Compression of laser pulses by near-forward Raman amplification in plasma journal January 2020
Flying focus and its application to plasma-based laser amplifiers journal November 2018
Plasma-based accelerators: then and now journal August 2019
Photon Acceleration in a Flying Focus journal September 2019
Spatiotemporal light control with frequency-gradient metasurfaces journal July 2019
Spatio-temporal and spatiospectral metrology of terahertz broadband uniformly topologically charged vortex beams journal December 2018
What is the maximum differential group delay achievable by a space-time wave packet in free space? journal January 2019
Control of laser light by a plasma immersed in a tunable strong magnetic field journal January 2019
Description of spatio-temporal couplings from heat-induced compressor grating deformation journal January 2020
Influence of longitudinal chromatism on vacuum acceleration by intense radially polarized laser beams journal January 2019
Ionization-assisted refocusing of femtosecond Gaussian beams journal January 2019
What is the maximum differential group delay achievable by a space-time wave packet in free space? text January 2019
Description of spatio-temporal couplings from heat-induced compressor grating deformation text January 2020
Ionization waves of arbitrary velocity driven by a flying focus text January 2017
Photon Acceleration in a Flying Focus text January 2019

Figures / Tables (5)


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