Orbital angular momentum,as an important spatial degree of freedom of light,has prompted various promising applications.The recently proposed generalized vortex beams may further enhance the flexibility by utilizing c...Orbital angular momentum,as an important spatial degree of freedom of light,has prompted various promising applications.The recently proposed generalized vortex beams may further enhance the flexibility by utilizing customer-defined angular phase gradients,enabling intuitive graphic representation of mathematical operations and other interesting functionalities.Here,based on Dammann optimization,we propose and demonstrate a threedimensional generalized vortex beam array using a single-layer metasurface,with all-parameter modulation including polarization,phase,angular momentum,and stereoscopic space.Furthermore,simultaneous vectorial modulation within each order can be endowed through joint optimization to achieve arbitrary polarization information distribution.This novel approach to generating the 3D generalized vortex beam array offers great flexibility in utilizing multiple degrees of freedom of light,further expanding the information capacity and spatial mode features and facilitating applications such as optical wireless broadcasting,optical communication encryption,structured beam manipulation,etc.展开更多
基金provided by the National Key R&D Program of China(2021YFA1401200)the National Natural Science Foundation of China program(No.U21A20140)+3 种基金the Beijing Natural Science Foundation(JQ24028)the National Science Fund for Distinguished Young Scholars(No.52325505)the support from the Agency for Science,Technology and Research MTC IRG(M22K2c0088)Ministry of Education(A-8002152-00-00,A-0005172-01-00,A-8002458-00-00)of Singapore.
文摘Orbital angular momentum,as an important spatial degree of freedom of light,has prompted various promising applications.The recently proposed generalized vortex beams may further enhance the flexibility by utilizing customer-defined angular phase gradients,enabling intuitive graphic representation of mathematical operations and other interesting functionalities.Here,based on Dammann optimization,we propose and demonstrate a threedimensional generalized vortex beam array using a single-layer metasurface,with all-parameter modulation including polarization,phase,angular momentum,and stereoscopic space.Furthermore,simultaneous vectorial modulation within each order can be endowed through joint optimization to achieve arbitrary polarization information distribution.This novel approach to generating the 3D generalized vortex beam array offers great flexibility in utilizing multiple degrees of freedom of light,further expanding the information capacity and spatial mode features and facilitating applications such as optical wireless broadcasting,optical communication encryption,structured beam manipulation,etc.
