Ultrafast time-resolved spectroscopy of a fs-laser-induced plasma inside glass using a super-continuum probe beam

Hernández-Rueda, Javier; Witcher, Jonathan J.; Krol, Denise M.

doi:10.1007/s00339-019-2897-x

Cited by 4 publications

(2 citation statements)

References 42 publications

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“…First, a key information is the absolute delay between pump and probe. This is crucial to link the excitation dynamics to the actual pump pulse intensity 25 . Although synchronizing pump and probe pulses at a sample surface seems reasonably easy, the case of the synchronization of pump and probes in the bulk of a sample remains unaddressed.…”

Section: Introductionmentioning

confidence: 99%

In-situ diagnostic of femtosecond laser probe pulses for high resolution ultrafast imaging

et al. 2021

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Ultrafast imaging is essential in physics and chemistry to investigate the femtosecond dynamics of nonuniform samples or of phenomena with strong spatial variations. It relies on observing the phenomena induced by an ultrashort laser pump pulse using an ultrashort probe pulse at a later time. Recent years have seen the emergence of very successful ultrafast imaging techniques of single non-reproducible events with extremely high frame rate, based on wavelength or spatial frequency encoding. However, further progress in ultrafast imaging towards high spatial resolution is hampered by the lack of characterization of weak probe beams. For pump–probe experiments realized within solids or liquids, because of the difference in group velocities between pump and probe, the determination of the absolute pump–probe delay depends on the sample position. In addition, pulse-front tilt is a widespread issue, unacceptable for ultrafast imaging, but which is conventionally very difficult to evaluate for the low-intensity probe pulses. Here we show that a pump-induced micro-grating generated from the electronic Kerr effect provides a detailed in-situ characterization of a weak probe pulse. It allows solving the two issues of absolute pump–probe delay determination and pulse-front tilt detection. Our approach is valid whatever the transparent medium with non-negligible Kerr index, whatever the probe pulse polarization and wavelength. Because it is nondestructive and fast to perform, this in-situ probe diagnostic can be repeated to calibrate experimental conditions, particularly in the case where complex wavelength, spatial frequency or polarization encoding is used. We anticipate that this technique will enable previously inaccessible spatiotemporal imaging in a number of fields of ultrafast science at the micro- and nanoscale.

show abstract

Section: Introductionmentioning

confidence: 99%

In-situ diagnostic of femtosecond laser probe pulses for high resolution ultrafast imaging

et al. 2021

View full text Add to dashboard Cite

show abstract

“…First, a key information is the absolute delay between pump and probe. This is crucial to link the excitation dynamics to the actual pump pulse intensity 22 . Although synchronizing pump and probe pulses at a sample surface seems reasonably easy, the case of the synchronization of pump and probes in the bulk of a sample remains unaddressed.…”

Section: Introductionmentioning

confidence: 99%

In-situ diagnostic of femtosecond probes for high resolution ultrafast imaging

Xie,

Meyer,

Froehly

et al. 2021

Preprint

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Ultrafast imaging is essential in physics and chemistry to investigate the femtosecond dynamics of nonuniform samples or of phenomena with strong spatial variations. It relies on observing the phenomena induced by an ultrashort laser pump pulse using an ultrashort probe pulse at a later time. Recent years have seen the emergence of very successful ultrafast imaging techniques of single non-reproducible events with extremely high frame rate, based on wavelength or spatial frequency encoding. However, further progress in ultrafast imaging towards high spatial resolution is hampered by the lack of characterization of weak probe beams. Because of the difference in group velocities between pump and probe in the bulk of the material, the determination of the absolute pump-probe delay depends on the sample position. In addition, pulse-front tilt is a widespread issue, unacceptable for ultrafast imaging, but which is conventionally very difficult to evaluate for the low-intensity probe pulses. Here we show that a pump-induced micro-grating generated from the electronic Kerr effect provides a detailed in-situ characterization of a weak probe pulse. It allows solving the two issues. Our approach is valid whatever the transparent medium, whatever the probe pulse polarization and wavelength. Because it is nondestructive and fast to implement, this in-situ probe diagnostic can be repeated to calibrate experimental conditions, particularly in the case where complex wavelength, spatial frequency or polarization encoding is used. We anticipate that this technique will enable previously inaccessible spatiotemporal imaging in all fields of ultrafast science and high field physics at the micro-and nanoscale.

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Effects of unmagnetized and magnetically confined laser induced copper plasma ions on the surface, optical, wetting, electrical and mechanical properties of PMMA

Tariq

Bashir

Mahmood

et al. 2022

Nuclear Instruments and Methods in Physics Research Section B:

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Ultrafast time-resolved spectroscopy of a fs-laser-induced plasma inside glass using a super-continuum probe beam

Cited by 4 publications

References 42 publications

In-situ diagnostic of femtosecond laser probe pulses for high resolution ultrafast imaging

In-situ diagnostic of femtosecond laser probe pulses for high resolution ultrafast imaging

In-situ diagnostic of femtosecond probes for high resolution ultrafast imaging

Effects of unmagnetized and magnetically confined laser induced copper plasma ions on the surface, optical, wetting, electrical and mechanical properties of PMMA

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