12.01.21 - IRTG Seminar: David Busto "Attosecond photoionization dynamics measured by photoelectron interferometry"
David Busto, Atomic Physics, Lund University
| When |
Jan 12, 2021
from 06:00 PM to 07:00 PM |
|---|---|
| Where | Webinar via zoom |
| Contact Name | Simone Ortolf |
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Attosecond photoionization dynamics measured by photoelectron interferometry
The development of attosecond light sources in the extreme ultraviolet and X-ray spectral range since the beginning of the century has opened the door to the investigation of electronic processes in matter on their natural time scale. The interaction of these pulses with matter often results in the photoionization of the target, leading the creation of photoelectrons and photoions. Photoelectron interferometry aims at measuring the amplitude and phase of the emitted photoelectron wavepacket in the spectral domain in order to gain new information on the photoionization dynamics.
In this presentation I will introduced photoelectron interferometry and in particular the technique called Reconstruction of Attosecond Beating By Interference of Two-photon transitions (RABBIT) and I will show how it allows investigating atomic photoionization dynamics in both resonant and non-resonant conditions. In particular, I will discuss the measurement of photoionization time delays and show how the interference between multiple partial waves results in anisotropic photoionization dynamics. Finally, I will present the complete characterization of autoionized wavepackets in the time-frequency domain and I will discuss how these measurements are affected by quantum decoherence.
The development of attosecond light sources in the extreme ultraviolet and X-ray spectral range since the beginning of the century has opened the door to the investigation of electronic processes in matter on their natural time scale. The interaction of these pulses with matter often results in the photoionization of the target, leading the creation of photoelectrons and photoions. Photoelectron interferometry aims at measuring the amplitude and phase of the emitted photoelectron wavepacket in the spectral domain in order to gain new information on the photoionization dynamics.
In this presentation I will introduced photoelectron interferometry and in particular the technique called Reconstruction of Attosecond Beating By Interference of Two-photon transitions (RABBIT) and I will show how it allows investigating atomic photoionization dynamics in both resonant and non-resonant conditions. In particular, I will discuss the measurement of photoionization time delays and show how the interference between multiple partial waves results in anisotropic photoionization dynamics. Finally, I will present the complete characterization of autoionized wavepackets in the time-frequency domain and I will discuss how these measurements are affected by quantum decoherence.
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