Toward remote high energy terahertz generation

Tie-Jun Wang; Shuai Yuan; Yanping Chen; Daigle, Jean-François; Marceau, Claude; Théberge, Francis; Châteauneuf, Marc; Dubois, Jacques; See Leang Chin
September 2010
Applied Physics Letters;9/13/2010, Vol. 97 Issue 11, p111108
Academic Journal
Remote terahertz (THz) generation from a two-color femtosecond laser-induced filament in air was experimentally demonstrated. A record of remote THz emission at 16 m was achieved. THz pulse energy more than 250 nJ in the frequency range below 5.5 THz was recorded; this is two orders of magnitude stronger than that from single-color excitation. Back-scattered nitrogen (N2) fluorescence signal remotely measured with a lidar is linearly proportional to the THz emission, which would provide a more practical method to characterize the THz pulses.


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