A reconfigurable metasurface based on optical control provides a control paradigm for integrating multiple functions at the same aperture,which effectively expands the freedom of control.However,the traditional light ...A reconfigurable metasurface based on optical control provides a control paradigm for integrating multiple functions at the same aperture,which effectively expands the freedom of control.However,the traditional light control method requires the light source to directly illuminate the photosensitive device,which forces the metasurface to be placed only according to the light emitter position,and even to need to be integrated on the light emitter,limiting the application scenarios of light-controlled reconfigurable metasurfaces.In this work,a light control method based on optical fiber is proposed,which guides and controls the light propagation path through optical fiber.The metasurface can be flexibly deployed,breaking through the limitation of physical space.As a verification,photoresistors are embedded in the metasurface,and the active device is directly excited by the light source as a driving signal to realize the switching of a polarization conversion function.The experimental results show that the optical-fiber-controlled metasurface can achieve linear-to-linear polarization conversion in the light environment and linear-to-circular polarization conversion in the dark environment.This work paves a new way,to our knowledge,to achieve a light-controlled metasurface,which enriches the family of intelligent metasurfaces and has great potential in many fields.展开更多
基金National Key Research and Development Program of China(2022YFB3806200)National Natural Science Foundation of China(62201609,62401614,62401617)。
文摘A reconfigurable metasurface based on optical control provides a control paradigm for integrating multiple functions at the same aperture,which effectively expands the freedom of control.However,the traditional light control method requires the light source to directly illuminate the photosensitive device,which forces the metasurface to be placed only according to the light emitter position,and even to need to be integrated on the light emitter,limiting the application scenarios of light-controlled reconfigurable metasurfaces.In this work,a light control method based on optical fiber is proposed,which guides and controls the light propagation path through optical fiber.The metasurface can be flexibly deployed,breaking through the limitation of physical space.As a verification,photoresistors are embedded in the metasurface,and the active device is directly excited by the light source as a driving signal to realize the switching of a polarization conversion function.The experimental results show that the optical-fiber-controlled metasurface can achieve linear-to-linear polarization conversion in the light environment and linear-to-circular polarization conversion in the dark environment.This work paves a new way,to our knowledge,to achieve a light-controlled metasurface,which enriches the family of intelligent metasurfaces and has great potential in many fields.
