  Metasurfaces are planar structures that can manipulate the amplitude, phase
and polarization (APP) of light at subwavelength scale. Although various
functionalities have been proposed based on metasurface, a most general optical
control, i.e., independent complex-amplitude (amplitude and phase) control of
arbitrary two orthogonal states of polarizations, has not yet been realized.
Such level of optical control can not only cover the various functionalities
realized previously, but also enable new functionalities that are not feasible
before. Here, we propose a single-layer dielectric metasurface to realize this
goal and experimentally demonstrate several advanced functionalities, such as
two independent full-color printing images under arbitrary elliptically
orthogonal polarizations and dual sets of printing-hologram integrations. Our
work opens the way for a wide range of applications in advanced image display,
information encoding, and polarization optics.
