Generation of phase-stable half-cycle mid-infrared pulses through filamentation in gasesYutaka Nomura, Takao Fuji, Hideto Shirai, Noriaki Tsurumachi, Alexander A. Voronin and Aleksei M. ZheltikovEPJ Web of Conferences, 41 (2013) 11003DOI: https://doi.org/10.1051/epjconf/20134111003