Spatially resolved spectral phase interferometry with isolated attosecond pulse

TL;DR

This paper presents a method to characterize the spatial and spectral coherence of isolated attosecond pulses, demonstrating high coherence and potential for advanced time-resolved spectroscopy.

Contribution

It introduces a spatially resolved spectral phase interferometry technique for isolated attosecond pulses, revealing their high spatial, spectral, and temporal coherence.

Findings

High spatial and spectral coherence of IAPs confirmed

Periodic temporal oscillations observed across the spectrum

Potential for spatiotemporal dispersive electronic wave studies

Abstract

We characterized spatially resolved spectral phase interferometry with an isolated attosecond pulse (IAP). The measured spatial-spectral interferogram and spectral interference fringe visibility show a high degree of IAPs spatial and spectral coherences. In addition, the characterized spectral-delay interferogram shows periodic temporal oscillations over the full IAP continuous spectrum, which indicates high temporal coherence. The IAP coherence over broad continuous spectral region holds potential for realizing the time-resolved IAP phase-based spectroscopy, which will contribute to exploring spatiotemporal dispersive electronic wave dynamics in the future.