Ultrafast pump-probe as a real-time probe for nonlinear phonon dynamics

Date

Wednesday, April 3, 2024
13:00 - 14:00

Abstract

Ultrafast pump-probe spectroscopy is a powerful technique used to observe in real-time physical phenomena on timescales as short as tens of attoseconds. In this talk, I will discuss the generation of coherent phonon excitations using femtosecond laser pulses in SnTe where we observed an atypical phonon softening as a function of the laser fluence. We discuss our findings in comparison with a lower symmetry variant of our system (SnSe).

Finally, I will show how 2D pump-probe spectroscopy can unambiguously determine the nonthermal origin of the phonon softening suggesting its power in detecting non-thermal optically excited states of matter.

Organiser

UvA-IoP

Venue

Lab42 building

Room number

L1.13

Category

Colloquium

Topics

quantum matter

Speakers

Dr. Alon Ron (Tel Aviv University)