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The vector vortex is a coronagraphic imaging mode of the recentlycommissioned Subaru Coronagraphic Extreme-Adaptive Optics (SCExAO) platform onthe 8-m Subaru Telescope. This multi-purpose high-contrast visible andnear-infrared (R- to K-band) instrument is not only intended to serve as aVLT-class "planet-imager" instrument in the Northern hemisphere, but also tooperate as a technology demonstration testbed ahead of the ELTs-era, with aparticular emphasis on small inner-working angle (IWA) coronagraphiccapabilities. The given priority to small-IWA imaging led to the early designchoice to incorporate focal-plane phase-mask coronagraphs. In this context, atest H-band vector vortex liquid crystal polymer waveplate was provided toSCExAO, to allow a one-to-one comparison of different small-IWA techniques onthe same telescope instrument, before considering further steps. Here wepresent a detailed overview of the vector vortex coronagraph, from itsinstallation and performances on the SCExAO optical bench, to the on-skyresults in the extreme AO regime, as of late 2016/early 2017. To this purpose,we also provide a few recent on-sky imaging examples, notably high-contrast ADIdetection of the planetary-mass companion \kappa Andromedae b, with asignal-to-noise ratio above 100 reached in less than 10 mn exposure time.

An H-band Vector Vortex Coronagraph for the Subaru Coronagraphic Extreme-Adaptive Optics System