Ultrafast nanophysics and nanoplasmonics

Attosecond science is an excellent tool to capture the motion of electrons in nano-size systems. For example, we design and perform attosecond-resolution experiments to measure electron rescattering properties in dielectric nano systems, as a bottom-up model of electron propagation in biological tissues. In particular, we exploit attosecond streaking spectroscopy to track in real time the collisions that electrons experience in the material with an unprecedented time resolution. At the same time, we are interested in investigating electron dynamics in metallic nanoparticles, with the idea of developing new plasmonic-based technology for future petahertz electronics. In this context, we also study the ultrafast dephasing time of the ultrabroad-band plasmonic resonances in fullerenes with attosecond time resolution.

Reference: S. Biswas et al., "Attosecond correlated electron dynamics at C60 giant plasmon resonance", arXiv:21111.14464, November 2021.