Title: Table-top interferometry on extreme time and wavelength scales
Authors: Skruszewicz, Slawomir
Przystawik, Andreas
Schwickert, David
Sumfleth, Malte
Namboodiri, Mahesh
Hilbert, Vinzenz
Klas, Robert
Gierschke, Philipp
Schuster, Vittoria
Vorobiov, Anton 
Haunhorst, Christian 
Kip, Detlef  
Limpert, Jens
Rothhardt, Jan
Laarmann, Tim
Language: en
Subject (DDC): DDC::500 Naturwissenschaften und Mathematik::530 Physik
Issue Date: 2021
Publisher: Soc.
Document Type: Article
Journal / Series / Working Paper (HSU): Optics express 
Volume: 29
Issue: 24
Page Start: 40333
Page End: 40344
Publisher Place: Washington, DC
Short-pulse metrology and dynamic studies in the extreme ultraviolet (XUV) spectral range greatly benefit from interferometric measurements. In this contribution a Michelson-type all-reflective split-and-delay autocorrelator operating in a quasi amplitude splitting mode is presented. The autocorrelator works under a grazing incidence angle in a broad spectral range (10 nm - 1 μm) providing collinear propagation of both pulse replicas and thus a constant phase difference across the beam profile. The compact instrument allows for XUV pulse autocorrelation measurements in the time domain with a single-digit attosecond precision and a useful scan length of about 1 ps enabling a decent resolution of E/ΔE = 2000 at 26.6 eV. Its performance for selected spectroscopic applications requiring moderate resolution at short wavelengths is demonstrated by characterizing a sharp electronic transition at 26.6 eV in Ar gas. The absorption of the 11th harmonic of a frequency-doubled Yb-fiber laser leads to the well-known 3s3p64p1P1 Fano resonance of Ar atoms. We benchmark our time-domain interferometry results with a high-resolution XUV grating spectrometer and find an excellent agreement. The common-path interferometer opens up new opportunities for short-wavelength femtosecond and attosecond pulse metrology and dynamic studies on extreme time scales in various research fields.
Organization Units (connected with the publication): Experimentalphysik und Materialwissenschaften 
URL: http://arxiv.org/abs/2106.00333v2
ISSN: 1094-4087
DOI: 10.1364/OE.446563
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