Department of Physics, Panjab University, Chandigarh, India

Colloquium

(Jointly organised by Department of Physics and Department of Chemistry)

Date and time: 6 February 2013 (Wednesday), 3:00 pm
Venue: Seminar Hall

Title: Molecular manipulation by ultrafast Laser pulses

Speaker: Prof. Yehiam Prior, Sherman Professorial Chair in Chemical Physics, Department of Chemical Physics, Weizmann Institute of Science, Rehovot, Israel

Abstract: Molecules in the gas or liquid phases are generally randomly distributed and isotropically oriented in space. Thus, the determination and the measurement of chemical reaction rates or of optical properties requires, by necessity, averaging over all orientations. Femtosecond laser pulses enable molecular manipulation on time scales faster than the internal rotational and vibrational degrees of freedom, opening the way to the addressing of aligned and oriented molecules. In this talk I will review molecular alignment and control, and will discuss selective excitation of like species. Our recent observation by the rotational Doppler Effect will be described. Time permitting, I will also present predictions for the formation of vortices driver by the laser induced rotational motion of the molecules.

About the speaker: Prof. Yehiam Prior, eminent scientist in the field of nonlinear and ultrafast optics, light matter interaction and various areas in the interface of chemistry and physics. He is serving as Dean Faculty of Chemistry and Head, Nanotechnology Initiative Program at WIS. He has numerous patents to his credit. He has deep connections with academic and industrial world in India.