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Tuesday, May 13, 2014

PHYSICS COLLOQUIUM: The Extreme Nonlinear Optics of Air and Femtosecond Optical Filamentation

Under certain conditions, powerful ultrashort laser pulses can form greatly extended filaments of concentrated high intensity in gases, leaving behind a very long trail of deposited energy stored in plasma and in excitation of atomic and molecular states. Such filaments can be much longer than the longitudinal scale over which a laser beam typically diverges by diffraction. Central to the phenomenon is the ultrafast nonlinear response of atoms and molecules to extremely high electromagnetic fields. Howard Milchberg will describe their measurements of this response and show how we use this understanding in filamentation experiments, including the development of air waveguides for remote transport of extremely high average power laser beams. {Will appear in FYI on May 13, 2014
Start Time:
4:00 PM
End Time:
5:00 PM
Physical Sciences Complex
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Web Address:
Other Contact Information:
Carole Cuaresma Kiger +1 301 405 5945

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