Time-domain ptychography

TL;DR

This paper demonstrates the application of ptychography in the time domain to reconstruct complex temporal signals from spectral data, achieving femtosecond resolution in optical measurements.

Contribution

It introduces a novel time-domain ptychography method capable of reconstructing ultrafast temporal dynamics from spectral measurements.

Findings

Achieved temporal resolution down to approximately 5 femtoseconds.

Successfully reconstructed complex-valued time-varying object functions.

Demonstrated ptychography's applicability in ultrafast optical measurements.

Abstract

Through dedicated measurements in the optical regime we demonstrate that ptychography can be applied to reconstruct complex-valued object functions that vary with time from a sequence of spectral measurements. A probe pulse of approximately 1 ps duration, time delayed in increments of 0.25 ps is shown to recover dynamics on a ten times faster time scale with an experimental limit of approximately 5 fs.