Freiburg 2024 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 18: Attosecond Physics II / Interaction with VUV and X-ray Light (joint session A/MO)
A 18.5: Vortrag
Mittwoch, 13. März 2024, 12:15–12:30, HS 1010
Polarization dependence of high-order harmonic generation in the direct measurement of optical waveforms — •Ronak Narendra Shah1, Jahanzeb Muhammad1, Ianina Kosse1, Samuel Bengtsson2, Riccardo Mori1, Mario Niebuhr1, Fabio Frassetto3, Luca Poletto3, and Giuseppe Sansone1 — 1Physikalisches Institut, Albert-Ludwigs Universitaet Freiburg, Freiburg, 79104, Germany — 2Department of Physics, Lund University, PO Box 118, SE-221 00 Lund, Sweden — 3Istituto di Fotonica e Nanotecnologie, CNR, Padova, Italy
We present the polarization effects in an all-optical technique to measure the electric field of a few cycle laser pulse via high harmonic generation (HHG). In our approach, the generation of an isolated attosecond pulse (IAP) and the associated photon yield serves as an ultrashort temporal gate to characterize the electric field of a weak perturbing unknown pulse. Changing the polarization of the unknown laser pulse from parallel to orthogonal polarization with respect to the pulse generating IAP, we report the modulation in the harmonic yield at twice the laser period. The experimental results are in good agreement with simulations based on the strong-field approximations.
Keywords: Attosecond; Electric-field; Two-omega oscillations