CREOL Seminar: Gian Luca Dolso, MIT
Monday, October 13, 2025 12:00–1:00 PM
- LocationCREOL: CROL-103
- DescriptionTitle: Attosecond All-Optical Spectroscopy of Electron Dynamics in Solids
Abstract: The seminar will begin with an introduction to electron dynamics and their potential for information technologies. The importance of sub-cycle resolution and attosecond timescales in capturing and ultimately controlling ultrafast processes in solids will be highlighted.
Attosecond all-optical spectroscopy of monocrystalline diamond will then be presented. In this study, intense infrared pulses were shown to reversibly manipulate electro-optical properties on attosecond timescales. Using attosecond transient reflection spectroscopy over an extended photon energy range, it was demonstrated that virtual interband transitions significantly affect the timing and adiabaticity of the crystal response, even in regimes previously believed to be dominated by intraband motion. These results establish that virtual transitions are indispensable for an accurate description of strong-field-induced phenomena in solids, representing a key step toward understanding transient nonlinear optical processes and laying the groundwork for petahertz electronics.
The seminar will then transition to current research at MIT, where attosecond resolution is achieved using nanoscale electron emitters. The focus is on extending the detection capabilities of attosecond field-resolved spectroscopy, both by broadening the bandwidth and by enabling simultaneous measurement of the full vectorial electric field. With these advances, the technique aims to be applied to the study of ultrafast magnetism and spin dynamics, providing new opportunities to probe and control light-driven processes in condensed matter.
About the Speaker: Gian Luca Dolso is a postdoctoral fellow at the Massachusetts Institute of Technology (MIT) supported by the Progetto Roberto Rocca Fellowship. He earned his Ph.D. in Physics from Politecnico di Milano in 2024, where his research focused on attosecond and femtosecond solid-state spectroscopy to track ultrafast charge carrier dynamics in solids. At MIT, he works with Prof. Karl Berggren and Dr. Phillip Keathley attosecond field-resolved spectroscopy techniques using on-chip nanostructured devices. His current research focuses on extending the capabilities of attosecond field-resolved spectroscopy. Building on these advances, he aims to capture electron motion in solids at petahertz frequencies, as triggered by ultrashort light pulses. - Websitehttps://events.ucf.edu/event/3953334/creol-seminar-gian-luca-dolso-mit/