Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 31: Strong laser fields - II
A 31.5: Vortrag
Mittwoch, 7. März 2018, 15:15–15:30, K 2.019
Phase resolved measurements of strong field photoionization in alkali metal vapor — •Philipp Kellner1, Daniel Adolph2, Yinyu Zhang1,2, Danillo Zille1, Philipp Wustelt1, Max Moeller1, A. Maxwell Sayler1,2, and Gerhard G. Paulus1,2 — 1Institute of Optics and Quantumelectronics, Max-Wien-Platz 1, 07743 Jena — 2Helmholtz-Institute, Fröbelstieg 3, 07743 Jena
The carrier-envelope phase (CEP) is a crucial parameter for experiments where ultrashort strong pulses of laserlight interact with matter such as high harmonic and attosecond-pulse generation or above-threshold ionization. The talk will present phase-resolved measurements of strong-field photoionization from alkali metal vapor induced by few-cycle pulses at 800 nm and 1800 nm center wavelength. These measurements pave the way towards single-shot CEP- and pulse duration measurements in the mid-IR-wavelength range. Unlike well established techniques of CEP-measurement e.g. f-2f interferometers or the xenon-based CE phasemeter, the alkali-phasemeter should allow precise, single-shot phase characterization with high repetition rates and low pulse energies. The key to reducing the pulse energy lies in the usage of materials with low ionization potential. Lower ionization potentials allow for longer wavelength and smaller intensities by staying in the tunneling-ionization-regime. The CE phasemeter based on alkali metalls can make pulse reconstruction in the shortwave IR-Regime possible and might also be an alternative for pulse duration measurements with FROG.