Double Feature: Towards attosecond and femtosecond spectroscopy at extreme limits (Dr. Hanieh Fattahi)
Dr. Hanieh Fattahi
Attosecond Physics Division
Max Planck Institute of Quantum Optics
Herbert Walther Lecture Hall
This talk is devoted to modern methods for attosecond and femtosecond laser spectroscopy, with the special focus on applications that require extreme spatial resolution.
In the first part, I discuss two of
the long-standing challenges in attosecond spectroscopy: i) the required photon
flux for XUV pump-XUV probe spectroscopy, and ii) the necessary ultra-high
spatiotemporal resolution for resolving electron-dynamic in matter. High
harmonic generation by high-energy, high-power light transients holds promise to
overcome both barriers. I demonstrate our effort in this direction and the
first prototype field-synthesizer based on Yb:YAG, thin-disk laser technology.
In the second part of my talk, I
show the first proof of principle sampling of the electric field of light at
PHz frequency in ambient air by means of electro-optic sampling and discuss the
potential of the technique in molecular spectroscopy and imaging.