Ultrafast Terahertz Lab
If you are interested in exploring and controlling molecular dynamics by state-of-the-art THz fields and ultrashort optical laser pulses, come and step with us into the ERA OF TERA
Prof. Sharly Fleischer Lab, School of Chemistry
Upon their mutual interaction, light and matter are both affected by, and affecting each other. We use intense femtosecond fields in the visible, near-infrared (Optical, 1015 Hz) and terahertz (THz, 1012 Hz) regions of the electromagnetic spectrum to spectroscopically study, and coherently control molecules.
Combined excitation by both THz and Optical fields results in unique molecular responses, with direct applications to the study of molecular dynamics, nonlinear spectroscopy, ensemble collective phenomena and basic science.
If you are interested in exploring and controlling molecular dynamics by state-of-the-art THz fields and ultrashort optical laser pulses, come and step with us into the ERA OF TERA.
3D control of molecular angular distribution
In the gas, liquid and most condensed phases, molecules are isotropically distributed with respect to the lab frame of reference, namely they are randomly oriented with no preferred direction. Novel spectroscopic techniques such as High Harmonic Generation, Ultrafast X-ray diffraction/absorption and Molecular Frame Photoelectron/ion Angular Distributions require molecular samples with a preferred direction of orientation. We are developing new methods to enable 3D controlled molecular angular distributions, using both optical and THz fields as two independent 'molecular handles' over the molecular rotational motion.
Non-linear THz rotational spectroscopy
Nonlinear optical processes have become invaluable tools in spectroscopy. These require high field strengths, that are commonly available in the visible and IR. Recent developments of intense THz generation techniques paved the way to nonlinear spectroscopy in the THz frequency range. We are developing nonlinear THz spectroscopy for studying multi-level rotational systems.
Time resolved study of molecular dynamics
Upon their electronic excitation, molecules undergo rapid structural changes. cis<-->trans isomerization for example, involves the movement of atoms within a molecule, and the rearrangement of chemical bonds within the molecular frame. We are interested in observing these rearrangements directly and how they change on the femtosecond time scale, in order to shed new light on this fundamental phenomenon in chemistry.
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