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Phase-modulated metasurfaces that can implement the independent manipulation of co-and cross-polarized output waves under circularly polarized (CP) incidence have been proposed. With this, we introduce one particular metasurface composed of meta-atoms with a phase difference of 2π=3 to generate specific elliptically polarized waves under various polarized incidences. Furthermore, a metasurface composed of these above meta-atoms and the meta-atoms with a phase difference of π=3 arranged in a certain rule can realize polarization conversion function between linearly polarized and CP states. The designs shed new light on multifarious optical devices and may further promote the development of metasurface polarization optics.

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