Making Movies of Atomic Motion at the Angstrom and Femtosecond Scale

Seminar
QUEST Center event
No
Speaker
Adi Natan from Stanford
Date
25/12/2017 - 12:30Add to Calendar 2017-12-25 12:30:00 2017-12-25 12:30:00 Making Movies of Atomic Motion at the Angstrom and Femtosecond Scale Realizing imaging of atomic motion de-novo within multiple molecular bonds in isolated molecules, with Angstrom and femtosecond resolutions is a grand challenge for the atomic molecular and optical physics community.  We will present several recent results in imaging quantum dynamics at the atomic length and time scales using ultrafast coherent x-ray diffraction at free electron lasers, photoelectron self-diffraction via strong field ionization, coincidence techniques, and advanced imaging and data analysis schemes that create such molecular movies without prior information of the system under study.  Time-resolved femtosecond x-ray diffraction patterns from laser-excited molecular iodine were used to create high fidelity molecular movies de-novo. We imaged electronic population transfer, vibrational motion, dissociation, rotational dephasing, Raman transitions, and non-adiabatic population transfer via coherent mixing of different electronic states.  We’ll also discuss results from photoelectron velocity map imaging and coincidence techniques as potential routes for table-top molecular movies. Finally, we will discuss using novel experimental and analysis methods, extending to the condensed phase and to systems of increased complexity. Physics (Building 202), Room 301 המחלקה לפיזיקה physics.dept@mail.biu.ac.il Asia/Jerusalem public
Place
Physics (Building 202), Room 301
Abstract

Realizing imaging of atomic motion de-novo within multiple molecular bonds in isolated molecules, with Angstrom and femtosecond resolutions is a grand challenge for the atomic molecular and optical physics community.  We will present several recent results in imaging quantum dynamics at the atomic length and time scales using ultrafast coherent x-ray diffraction at free electron lasers, photoelectron self-diffraction via strong field ionization, coincidence techniques, and advanced imaging and data analysis schemes that create such molecular movies without prior information of the system under study.  Time-resolved femtosecond x-ray diffraction patterns from laser-excited molecular iodine were used to create high fidelity molecular movies de-novo. We imaged electronic population transfer, vibrational motion, dissociation, rotational dephasing, Raman transitions, and non-adiabatic population transfer via coherent mixing of different electronic states.  We’ll also discuss results from photoelectron velocity map imaging and coincidence techniques as potential routes for table-top molecular movies. Finally, we will discuss using novel experimental and analysis methods, extending to the condensed phase and to systems of increased complexity.

תאריך עדכון אחרון : 21/12/2017