Chiral metasurfaces enabling tunable spin selection for multidimensional images and beam splitting

Controlling the spin angular momentum or circular polarization state of waves has crucial applications in circular dichroism spectroscopy, optical communications, and information processing. Traditional chiral metasurfaces, however, have fixed electromagnetic responses and modulation functions post-fabrication, which significantly limits their practical applications. This limitation is particularly evident in their lack of active control and tunability, hindering further development of electromagnetic functional devices. In this work, we propose a Metal−Insulator−Metal (MIM) chiral metasurface (CM) achieve multidimensional control of light based on amplitude modulation along with frequency and temperature adjustments in polarization multiplexing. Based on the design metasurface, we obtain the multi-dimensional switchable images and integrated beam splitter with varying polarization conversion properties. Additionally, a tunable anomalous reflection function also is constructed by leveraging the phase transition characteristics of vanadium dioxide. The multi-dimensionally controllable and multifunctional chiral metasurface introduces new functionalities, offering promising prospects for the design of future integrated functional devices.