  Compact and robust cold atom sources are increasingly important for quantum
research, especially for transferring cutting-edge quantum science into
practical applications. In this letter, we report on a novel scheme that
utilizes a metasurface optical chip to replace the conventional bulky optical
elements used to produce a cold atomic ensemble with a single incident laser
beam, which is split by the metasurface into multiple beams of the desired
polarization states. Atom numbers $~10^7$ and temperatures (about 35 ${\mu}$K)
of relevance to quantum sensing are achieved in a compact and robust fashion.
Our work highlights the substantial progress towards fully integrated cold atom
quantum devices by exploiting metasurface optical chips, which may have great
potential in quantum sensing, quantum computing and other areas.
