ELFT HÍRADÓ

[<vera.horvath AT eli-alps.hu>]

Időpont: 2020. október 2. 9 óra

Előadó: Giuseppe Sansone (Physikalisches Institut, Albert-Ludwigs-Universität,
Freiburg, Németország)
Cím:   Attosecond correlation metrology as seeded free-electron lasers

Az előadás kivonata:
Recently the generation of trains [1] and isolated[2] attosecond pulses was
demonstrated at Free Electron Lasers (FELs) operating in the extreme
ultraviolet (XUV) and soft X-ray spectral range. FEL-driven attosecond sources
present important advantages with respect to table-top attosecond sources
based on high-order harmonic generation, including high-energies per pulse
(typically in the microjoule range), tunability of the photon energy and
shaping capability (in the case of train of attosecond pulses). On the other
hand, these sources present significant drawbacks such as temporal jitter
between the XUV waveform and the optical/infrared laser and lowrepetition
rates. In this talk I will show how the control of the relative phase between
the harmonics achieved at FERMI [3] gives access to its characterization, by
implementing a correlation-based analysis of the photoelectron spectra
generated by the combination of the attosecond and infrared pulses. I will
also present novel ideas on how to extend the correlation-analysis tools for
extending attosecond metrology to situations in which sub-cycle
synchronization between the attosecond waveform and the infrared field is not
guaranteed.
References
[1] P. K. Maroju et al. Attosecond pulse shaping using a seeded free-electron
Laser, Nature 578, 386-391 (2020).
[2] J. Duris et al. Tunable isolated attosecond X-ray pulses with gigawatt
peak power from a free-electron laser, Nature Photon. 14, 30-36 (2020).
[3] K. C. Prince et al. Coherent control with a short-wavelength free-electron
laser, Nature Photon. 10, 176-179 (2016).

A szemináriumhoz a következő linken lehet csatlakozni:
https://teams.microsoft.com/l/meetup-join/19%3ameeting_YzgzMDAyMmQtZTRkOS00YjFiLThiZmMtMWJkMmRmOWYzOTE4%40thread.v2/0?context=%7b%22Tid%22%3a%22b207389a-c5cb-4cb0-a1ad-227b94e96448%22%2c%22Oid%22%3a%22a12feac4-37de-4e24-89e9-c7833f7e5a28%22%2c%22IsBroadcastMeeting%22%3atrue%7d

A szeminárium angol nyelvű. Minden érdeklődőt szívesen látunk.

Horváth Vera