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Graduate Student Seminar - 04/05/2013

"Terahertz Energy Scaling and Saturation in Two-Color Laser Filamentation"

by Taek Il Oh

Friday, April 5, 2013 -- 12:00 p.m.
Large Conference Room, 1207 Energy Research Facility

Advisor:  Assistant Professor Ki-Yong Kim

Intense terahertz generation via two color laser-induced filamentation is studied with laser input energy up to 60 mJ. In the small f-number focusing regime, the output THz energy strongly saturates, which is attributed to ionization-induced laser defocusing in filamentation. This saturation effect can be minimized by elongating the plasma filament with weak focusing. A conversion efficiency of <10-4 is achieved in elongated filamentation.

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