  Violating a nonlocality inequality enables the most powerful remote quantum
information tasks and fundamental tests of quantum physics. Loophole-free
photonic verification of nonlocality has been achieved with
polarization-entangled photon pairs, but not with states entangled in other
degrees of freedom. Here we demonstrate completion of the quantum steering
nonlocality task, with the detection loophole closed, when entanglement is
distributed by transmitting a photon in an optical vector vortex state, formed
by optical orbital angular momentum (OAM) and polarization. As well as opening
up a high-efficiency encoding beyond polarization, the critically-important
demonstration of vector vortex steering opens the door to new free-space and
satellite-based secure quantum communication devices and device-independent
protocols.
