Determination of the phase of terahertz few-cycle laser pulses.
We propose an approach to determine the carrier-envelope phase (CEP) of a terahertz few-cycle pulse by observing the field-free molecular orientation. We find that the degree of orientation sensitively depends on the CEP, providing a new route for measuring the CEP without phase ambiguity. By taking advantage of the field-free molecular orientation, an important effect of the CEP drift caused by the dephasing of the generating medium on the accurate measurement of the CEP value is eliminated.
Department of Physics, Dalian University of Technology, Dalian 116024, China.
Chuan-Cun
CC
Shu
Kai-Jun
KJ
Yuan
Wen-Hui
WH
Hu
Shu-Lin
SL
Cong
D001703:Biophysics / Q000379:methods; D003198:Computer Simulation; D004574:Electromagnetic Fields; D004867:Equipment Design; D007834:Lasers; D008027:Light; D055095:Optics and Photonics; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation; D055053:Terahertz Radiation; D013997:Time Factors