Mon, Sep 26, 2022 @ 04:00 PM - 05:20 PM
Mork Family Department of Chemical Engineering and Materials Science
Conferences, Lectures, & Seminars
Speaker: Dr. Mohammed Hassan, Physics Department and Optical Sciences, University of Arizona
Talk Title: Control and Imaging of the Quantum Electron Motion in Action
Abstract: The electron motion in atoms and molecules is at the heart of all phenomena in nature. The advances in ultrafast light field and synthesis and attosecond spectroscopy enabled tracing and controlling electron motion dynamics in matter. In the first part of this talk, Dr. Hassan will present our capability for on-demand tailoring of light field waveforms spanning two optical octaves, from near-infrared electron motion in dielectric using synthesized light waveforms. This fine control allowed for switching the optical signal with attosecond time resolution. Furthermore, he will introduce the possibility of encoding binary data on ultrashort laser pulses waveforms. This work paves the way for establishing optical switched and light-based electronics with petahertz speeds, several orders of magnitude faster than the current semiconductor-based electronics, opening a new realm in information technology, optical communications, and photonic processors technologies. Dr. Hassan will present a new methodology for all-optical light field sampling and electron meteorology, which allows measuring the electronic delay response in the dielectric system. In the second half of the talk, Dr. Hassan will present the latest results of imaging the quantum electron motion in solid-state in action. He will explain how his team was able to attain the native electron motion (attosecond) temporal resolution in the electron microscope, orders of magnitude faster than the highest reported imaging resolution, by generating a single-isolated attosecond electron pulse inside the microscope and the embellishment of what we call "Attomicroscopy". This attosecond electron imaging by Attomicroscopy provides more insights into the electron dynamics in real-time and space with attosecond and picometer resolutions and promises to find long-anticipated real-life attosecond science application in quantum physics, chemistry, and biology.
Biography: Education: Ph.D. Physics, 2013, Max-Plank Institute for Quantum Optics- Ludwig Maximilian University of Munich
Fields of Study: Atomic, Molecular, and Optical Physics; Condensed Matter Physics
Research Interests: Dr. Hassan''s research focuses on achieving the attosecond temporal resolution in electron microscopy by generative attosecond electron pulses and establishing the "Attomicroscopy" field, which will be utilized for recording film of electronic and atomic motion in action.
Host: Professor Moh El-Naggar (Dept of Physics and Astronomy Colloquium); Professor Andrea Martin Armani (Mork Family Dept of Chemical Engineering and Materials Science)
More Information: 9.26.2022.Mohammed Hassan (1).pdf
Audiences: Everyone Is Invited
Contact: Anthony Tritto