Dr. Shouyuan Chen 

J.R. MacDonald Lab

Kansas State University

Monday, January 25, 2010

4:30 p.m.

Cardwell 102

Towards Attosecond Nonlinear Physics

Current single isolated attosecond pulses are not intense enough for studying nonlinear physics. I will present the research efforts in the Kansas Light Source group to scale up the attosecond photon flux by using driving lasers with high power.  The carrier-envelope phase of a 6 mJ, 1 kHz laser with stabilized carrier-envelope phase was developed for this purpose. I will show the generation of phase-matched single attosecond pulse with this new laser in the photon energy range below the ionization threshold of helium atoms. Such VUV attosecond pulses are desirable for investigating nonlinear dynamics in many atoms and molecules.