摘要
The terahertz(THz)temporal waveform and spectrum from a longitudinal electrically biased femtosecond filament is studied experimentally.The initial direction of the electron motion inside the unbiased filament plasma is deduced from the transformation of the THz temporal waveform with applied fields of opposite polarities.Furthermore,a spectrum shift to lower frequency of the THz spectrum is observed in the presence of a biased field.It agrees well with theoretical predictions.
作者
Yi Lin
Shaojie Liu
Aurélien Houard
AndréMysyrowicz
Vladimir T.Tikhonchuk
刘一;刘少杰;Aurélien Houard;AndréMysyrowicz;Vladimir T.Tikhonchuk(Shanghai Key Lab of Modern Optical System,University of Shanghai for Science and Technology,Shanghai 200093,China;Laboratoire d’Optique Appliquée,ENSTA Paris,Ecole Polytechnique,CNRS,Institut Polytechnique de Paris,828 Boulevard des Maréchaux,91762 Palaiseau cedex,France;Centre Lasers Intenses et Applications,University of Bordeaux-CNRS-CEA,351 Cours de la Liberation,33405 Talence cedex,France;ELI-Beamlines,Institute of Physics,Czech Academy of Sciences,25241 Dolni Brezany,Czech Republic)
基金
Supported by the National Natural Science Foundation of China(Grant No.11574213)
the Innovation Program of Shanghai Municipal Education Commission(Grant No.2017–01-07-00-07-E00007)。
