  Harnessing structured light is fascinating for its multi-disciplinary
applications, e.g., in remote driving microrobots, sensing, communications, and
ultrahigh resolution imaging. Here we experimentally demonstrated the
generation of a vortex N2+ lasing pumped by a wavefront structured
near-infrared femtosecond pulse with an orbital angular momentum. The
topological charge of the new-born N2+ lasing is measured to be twofold that of
the pump beam. As compared to the case with pump beam of plane wavefront, the
N2+ lasing generation efficiency is much higher for the vortex pump beam at
high pumping energy which has a higher clamping intensity by reducing the
on-axis plasma density. Our results herald a stirring marching into the
territory of remote structured N2+ lasing.
