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Optical nanoantennas efficiently convert confined optical energy into free-space radiation. Manipulating the polarization of the radiated light is not straightforward. By attaching a dielectric nanoantenna to a waveguide, the authors demonstrate a way to synthetize the polarization of the emitted light by controlling the amplitude and phase of the signals feeding the nanoantenna from each side of the waveguide.

(Picture: F. J. Rodríguez-Fortuño et al., 10.1002/lpor.201300184, pp. L27–L31, in this issue)