  Harnessing solar radiation pressure is key to transforming space exploration
with multiple low cost sunlight propelled spacecraft to outer reaches of space.
By controlling the direction of sunlight momentum transfer new missions and
better maneuvering in space can be accessed. Here, we discuss design principles
for taming in-plane radiation pressure under ambient sunlight. We propose and
study theoretically ultra-wideband polarization insensitive metasurfaces for
anomalous light reflection. Our design based on segmented tapered patch
nanoantenna arrays allows reflection of >60% into one diffraction orders over a
400 nm band across larger part of the solar spectrum. Owing to a wideband
nature and polarization insensitivity, our structures convert incident
radiation into in-plane radiation pressure force with almost 30% efficiency. We
discuss applications of our design to controlling solar sail spin. Beyond solar
sailing, we envision that such anomalous metasurfaces for ambient sunlight will
find use in solar concentration, spectrum splitting, and solar fuels.
