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Intensity Dependence of Laser-Assisted Attosecond Photoionization Spectra

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TLDR
In this paper, the influence of the intensity of the IR probe field on APT phase measurements performed with the RABITT method was investigated and it was shown that if a strong IR field is applied, the attosecond pulses will appear to have lower-than-actual chirp rates.
Abstract
We study experimentally the influence of the intensity of the infrared (IR) probe field on attosecond pulse train (APT) phase measurements performed with the RABITT method (Reconstruction of Attosecond Beating by Interference in Two-Photon Transitions). We find that if a strong IR field is applied, the attosecond pulses will appear to have lower-than-actual chirp rates. We also observe the onset of the streaking regime in the breakdown of the weak-field RABITT conditions. We perform a Fourier-analysis of harmonic and sideband continuum states and show that the mutual phase relation of the harmonics can be extracted from higher Fourier components.

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Journal ArticleDOI

Introduction to attosecond delays in photoionization

TL;DR: In this article, the authors present an introduction to the interaction of light and matter on the attosecond timescale and the theoretical description of ultra-short time delays and relate these to the phase of extreme ultraviolet (XUV) light pulses and to the asymptotic phaseshifts of photoelectron wave packets.
Journal ArticleDOI

Attosecond dynamical Franz-Keldysh effect in polycrystalline diamond

TL;DR: Attosecond transient absorption spectroscopy was applied to investigate the interaction between polycrystalline diamond and a few-femtosecond infrared pulse with intensity below the critical intensity of optical breakdown, and identified infrared induction of intraband currents as the main physical mechanism responsible for the observations.
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Energy-dependent photoemission delays from noble metal surfaces by attosecond interferometry

TL;DR: In this paper, an interferometric technique based on attosecond pulse trains is applied simultaneously in a gas phase and a solid-state target to derive surface-specific photoemission delays.
Journal ArticleDOI

Energy-dependent photoemission delays from noble metal surfaces by attosecond interferometry

TL;DR: In this paper, an interferometric technique based on attosecond pulse trains is applied simultaneously in a gas phase and a solid state target to derive surface-specific photoemission delays.
References
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Book

Modern Quantum Mechanics

TL;DR: Modern Quantum Mechanics as mentioned in this paper is a classic graduate level textbook, covering the main quantum mechanics concepts in a clear, organized and engaging manner, and introduces topics that extend the text's usefulness into the twenty-first century, such as advanced mathematical techniques associated with quantum mechanical calculations.

Nonlinear optics

TL;DR: In this method, non-linear susceptibility tensors are introduced which relate the induced dipole moment to a power series expansion in field strengths and the various experimental observations are described and interpreted in terms of this formalism.
Journal ArticleDOI

Observation of a Train of Attosecond Pulses from High Harmonic Generation

TL;DR: It is found that the harmonics are locked in phase and form a train of 250-attosecond pulses in the time domain, suggesting that Harmonic generation may be a promising source for attosecond time-resolved measurements.
Journal ArticleDOI

Isolated Single-Cycle Attosecond Pulses

TL;DR: The availability of single-cycle isolated attosecond pulses opens the way to a new regime in ultrafast physics, in which the strong-field electron dynamics in atoms and molecules is driven by the electric field of the attose Cond pulses rather than by their intensity profile.
Journal ArticleDOI

Time-resolved atomic inner-shell spectroscopy

TL;DR: It is demonstrated that a laser-based sampling system, consisting of a few-femtosecond visible light pulse and a synchronized sub-feminine soft X-ray pulse, allows us to trace the relaxation dynamics of core-excited atoms directly in the time domain with attosecond resolution.
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