摘要
An optical metasurface is an ultrathin optical design composed of subwavelength meta-atoms that have demonstrated unprecedented capabilities in manipulating light propagation.By now,numerous functionalities have been realized,such as beam engineering,wave plates,polarizers,holograms,and metalenses.People are expecting a new version of metasurface 2.0 that will not only enrich the frontiers of optical sciences but also revolutionize traditional optical devices and technology in practical applications.Aiming to present the impressive progress in this field,Chinese Optics Letters publishes this special issue focusing on multifunctional metasurfaces,coupled plasmonic metasurfaces,reconfigurable metadevices,quantum metasurfaces for entangled photons,and neural network metadesigns that indicate the development directions of metasurfaces to a great extent.
