Seminar:"Probe and control electronic and nuclear dynamics of small molecules in strong laser fields" by, Dr. Jian Wu 7.14.14/11:00am-12:00pm/ CREOL 102

Monday, July 14, 2014 11:00 AM to 12:00 PM
CREOL Room 102

Jian Wu

State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China

Abstract:

The near-infrared intense ultrashort laser pulse can be used to probe and control the rich electronic and nuclear dynamics of molecules through the multiphoton process. It is interesting not only for the fundamental molecular physics, but also for the coherent control of the chemical reactions. Experimentally, the electrons and ions ejected from a molecule are measured in coincidence with the cold target recoil ion momentum spectroscopy (COLTRIMS). By using the technique of the coincidence angular streaking, we show that the dynamics of electron localization, especially the instantaneous field-direction and internuclear-distance dependences, can be directly probed and controlled from the diatomic to polyatomic hydrocarbon molecules, which is very recently extended to two-dimension. We show that the vibrational motion of the nuclei can be semi-classically traced and controlled by using two time-delayed ultrashort laser pulses of detuned wavelengths. By controlling the rotational nuclear wavepacket, we impulsively align molecules which can be used to manipulate the spatiotemporal and frequency properties of a properly matched ultrashort laser pulse, e.g., the supercontinuum generation, THz radiation, attraction and repulse of intense filaments, photonic plasma grating, and so on. Our experiments also reveal the electron-nuclear energy sharing in above-threshold multiphoton ionization of molecules.

Biography:

Education

PhD in Optics, East China Normal University (Sept. 2002 – Jul. 2007)

Visiting graduate student, University of Rochester (Nov. 2005 – Dec. 2006)

BS in Physics, East China Normal University (Sept. 1998 – Jul. 2002)

Employment

Professor in the State Key Lab. of Precision Spectroscopy, East China Normal

University, Shanghai, China

Jul. 2010 to present

Humboldt research Fellow in the Institut für Kernphysik, Goethe-Universität

Frankfurt, Frankfurt am Main, Germany

Sept. 2010 –Aug. 2012

Associate Professor in the State Key Lab. of Precision Spectroscopy, and

Department of Physics, East China Normal University, Shanghai, China

Jul. 2007 – Jul. 2010

Honours and Awards

New Century Excellent Talents in University: Ministry of Education of China (2013)

Eastern Scholar: Shanghai Municipal Education Commission (2013)

France Talent Innovation: French Consulate General in Shanghai (2010)

Shanghai Rising-Star: Shanghai Science and Technology Commission (2009)

Rao-Yutai fundamental optics award: Optical Society of China (2007)

Research Interests

Dynamics of atoms/molecules in strong laser fields, ultrafast nonlinear optics, ultrashort

pulse generation, and ultrafast time-resolved techniques.

Publications

Jian Wu has published about 80 research papers in peer-reviewed scientific journals,

including 2 in Nature Communications and 11 in Physical Review Letters