Project Details
Projekt
Petahertz field reconstruction for the investigation of ultrafast electronic dynamics
Applicant
Professor Dr. Giuseppe Sansone
Subject Area
Optics, Quantum Optics and Physics of Atoms, Molecules and Plasmas
Experimental Condensed Matter Physics
Experimental Condensed Matter Physics
Term
from 2018 to 2023
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 411022471
The main goal of the project is to demonstrate a new experimental technique for the investigation of ultrafast electronic dynamics (down to the attosecond regime). The technique is based on the complete electric field reconstruction of visible and near-infrared pulses after the interaction with a system, excited by an initial pump pulse. The electronic dynamics ongoing in the system modifies the electric field of the probe pulse, which can be reconstructed by means of spatially-resolved extreme ultraviolet interferometry based on isolated attosecond pulses. The research group has recently demonstrated that this approach can be used for the complete temporal characterization of weak few-cycle pulses with a complex polarization state. Within this project, this new experimental approach will be applied for the investigation of the plasmonics dynamics excited in metallic nanospheres (typically gold and silver), which present a large response in the visible and near-infrared spectral range. By reconstructing the complete electric field, we will gain access to the complete dielectric wave function of the system and to its delay dependent evolution after the initial excitation. The comparison of the experimental outcomes with theoretical models and numerical simulations should give information on the few-femtosecond electronic dynamics in the nanostructured systems.The method should not be limited to nanosystems, but should be applicable for the reconstruction of the probe pulses in all pump-probe optical setups.
DFG Programme
Priority Programmes
