Terahertz wave generation from gas plasma using a phase compensator with attosecond phase-control accuracy

Dai, Jianming; Zhang, X.-C.
January 2009
Applied Physics Letters;1/12/2009, Vol. 94 Issue 2, pN.PAG
Academic Journal
We report the use of a precise phase compensator for the generation of intense terahertz waves from laser-induced gas plasma excited by a femtosecond pulse (ω) and its second harmonic (2ω) at both close contact and standoff distances. The attosecond accuracy phase-control capability of the device enables further optimization of the terahertz emission from gas plasma and elimination of the temporal walkoff between the ω and 2ω pulses traveling in dispersive media, resulting in intense terahertz generation at a distance of over 100 m by sending the optical beams far away and focusing them locally.


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