Direct measurement of the electron density of extended femtosecond laser pulse-induced filaments
Chen, Y. -H. · Varma, S. · Antonsen, T. M. · Milchberg, H. M.
Original · EN
We present direct time- and space- resolved measurements of the electron density of femtosecond laser pulse-induced plasma filaments. The dominant nonlinearity responsible for extended atmospheric filaments is shown to be field-induced rotation of air molecules.
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