On the observation of field-free orientation of a symmetric top molecule   by terahertz laser pulses at high temperature
  We investigate experimentally and numerically the field-free orientation of the symmetric top molecule of methyl-iodide at high temperature using a terahertz radiation generated by a plasma induced by a two-color laser beam. The degree of orientation is measured from the free-induction decay emitted by the sample. The observed experimental signal is reproduced with a good accuracy by numerical simulations. 
P. Babilotte, K. Hamraoui, F. Billard, E. Hertz, B. Lavorel, O.   Faucher and D. Sugny
quant-ph