  Selective control of light is essential for optical science and technology
with numerous applications. Nanophotonic waveguides and integrated couplers
have been developed to achieve selective coupling and spatial control of an
optical beam according to its multiple degrees of freedom. However, previous
coupling devices remain passive with an inherently linear response to the power
of incident light limiting their maximal optical selectivity. Here, we
demonstrate nonlinear optical selectivity through selective excitation of
individual single-mode nanolasers based on the spin and orbital angular
momentum of light. Our designed nanolaser circuits consist of plasmonic
metasurfaces and individual perovskite nanowires, enabling subwavelength
focusing of angular-momentum-distinctive plasmonic fields and further selective
excitation of single transverse laser modes in nanowires. The optically
selected nanolaser with nonlinear increase of light emission greatly enhances
the baseline optical selectivity offered by the metasurface from about 0.4 up
to near unity. Our demonstrated nonlinear optical selectivity may find
important applications in all-optical logic gates and nanowire networks,
ultrafast optical switches, nanophotonic detectors, and on-chip optical and
quantum information processing.
