Rostock 2019 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 7: Interaction with strong or short laser pulses
A 7.2: Vortrag
Montag, 11. März 2019, 14:30–14:45, S HS 3 Physik
Carrier-envelope phase measurement at short-wave infrared wavelengths and Gouy-phase effects in strong-field ionization — •Yinyu Zhang1,2, Danilo Zille1,2, Philipp Wustelt1,2, Dominik Hoff1,2, Slawomir Skruszewicz1,2, A. Max Sayler1,2, and Gerhard G. Paulus1,2 — 1Helmholtz Institute, Jena, Germany — 2Institute of Optics and Quantum Electronics, Jena, Germany
Here, we report on the implementation of a single-shot, real-time, carrier-envelope phase (CEP) measurement based on the measurement of stereographic above-threshold ionization (ATI) at 1.8 μm [1], which is so-called the carrier-envelope phasemeter (CEPM). A specific feature of the CEPM is the ability for simultaneous characterization of the pulse duration. In addition, the CEP dependent stereo-ATI spectra of Xenon at 0.8 μm and 1.8 μm are simulated by using a semi-classical model and 1D-TDSE model. Simulation results for both models show larger CEP-dependence than the measurements for different pulse lengths and this discrepancy increases with decreasing the pulse length. Inspired by the observation of the axial phase shift, known as Gouy phase, or Porras phase (for broadband pulses) [2], such phase shifts are then introduced in the simulation. The new results show a better match with the measurements and it also provides us a more precise calibration for pulse lengths measurement. [1] Y. Zhang et al., Opt. Lett. 42, 5150 (2017). [2] D. Hoff et al., Nat. Phys. 13 947-951 (2017)