Hannover 2020 – scientific programme

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A: Fachverband Atomphysik

A 2: Attosecond physics I

A 2.3: Talk

Monday, March 9, 2020, 11:45–12:00, f107

Attosecond XUV Fourier transform spectroscopy — •Laura Maikowski, Lorenz Drescher, Oleg Kornilov, Marc Vrakking, and Tobias Witting — Max-Born-Institut, Max-Born-Strasse 2A, 12489 Berlin

We aim to extend the methods of Fourier transform spectroscopy into the XUV domain. Our goal is to create a phase-locked pair of isolated attosecond XUV pulses, in combination with a strong NIR few-cycle pulse. As pulse splitting in the XUV is difficult, we create a pulse pair in the NIR range and then generate the XUV pulse pair via high harmonic generation [1,2,3]. As we want to create isolated attosecond pulses we have to create a pair of few-cycle pulses. To achieve this we constructed a few-cycle compatible Mach-Zehnder interferometer, which is actively phase-stabilized to a residual delay jitter of 5 as rms. A pair of 4 fs, 800nm few-cycle pulses from this interferometer is used to produce a pair of attosecond XUV pulses in the 15 to 50 eV energy range.

[1] Austin et al. Lateral Shearing Interferometry of High-Harmonic Wavefronts. Opt. Lett 36, 1746-48 (2011)

[2] Meng et al. Octave-Spanning Hyperspectral Coherent Diffractive Imaging in the Extreme Ultraviolet Range. Opt. Expr. 23, 28960-69 (2015)

[3] Jansen et al. Spatially Resolved Fourier Transform Spectroscopy in the Extreme Ultraviolet. Optica 3, 1122-25 (2016)