It is known that manipulating the polarization of light on the microscale or nanoscale is essential for integrated photonics and quantum optics. In this talk, we present our recent studies on polarization manipulation and multiplexing in optical metasurfaces. One is to realize multichannel distribution and transformation of entangled photons with dielectric metasurface, and the other is to break the limitation of polarization multiplexing in optical metasurfaces with engineered noise. The approaches achieve potential applications in optical display, data storage, information encryption, and quantum information networks.
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