University of California

Chandrasekhar J Joshi

John M Dawson

Scott C Wilks

Warren B Mori

Andrew M Sessler

Photons of an electromagnetic source wave are frequency-upshifted as a plasma is rapidly created around the path of this propagating source wave. The final frequency can be controlled by adjusting the gas density. A controlled time-varying frequency (chirped) pulse can be produced by using a controlled spatially varying gas density. The plasma must be created in a time which is short compared to the transit time of the light through the plasmas region. For very fast creation over one to at most a few light periods of an overdense plasma, static magnetic fields with short wavelengths are created.

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Santa Monica, CA, United States of America

Chandrasekhar J Joshi