A retroreflector,an optical device that reflects light back along its incident path,plays a crucial role in optics.However,achieving high-efficiency,large-area retroreflection in planar optical systems remains a persi...A retroreflector,an optical device that reflects light back along its incident path,plays a crucial role in optics.However,achieving high-efficiency,large-area retroreflection in planar optical systems remains a persistent challenge,constrained by the bulky nature of traditional designs like corner cube mirrors and cat’s eye retroreflectors.Here,we demonstrate a scalable metasurface-refractive retroreflector(MRR)that combines a refractive lens and meta-lens,achieving polarization-independent retroreflection with a half power field of view(FOV)of 70°and 88.5%efficiency at normal incident.The scalability of the MRR enables straightforward planar expansion into arrays,facilitating large-area effective retroreflection.Additionally,a moving object equipped with MRR is observed in a laser tracking experiment.The metasurface-refractive architecture evidently improves the functionality of the retroreflector,and paves a new path in the field of smart optical device design.展开更多
基金supported by the National Program on Key Basic Research Project of China(2022YFA1404300)National Natural Science Foundation of China(No.12325411,62288101,11774162,and 62375232)+5 种基金The Open Research Fund of the State Key Laboratory of Transient Optics and Photonics,Chinese Academy of Sciences(SKLST202218)the Fundamental Research Funds for the Central Universities(020414380175)Natural Science Research Start Start-up Foundation of Recruiting Talents of Nanjing University of Posts and Telecommunications(Grant No.NY223152)The University Grants Committee/Research Grants Council of the Hong Kong Special Administrative Region,China[Project No.AoE/P-502/20,CRF Project:C5031-22G and C1015-21E,GRF Project:CityU15303521CityU11305223,and Germany/Hong Kong Joint Research Scheme:GCityU101/22]City University of Hong Kong[Project No.9380131,9610628,and 7005867].
文摘A retroreflector,an optical device that reflects light back along its incident path,plays a crucial role in optics.However,achieving high-efficiency,large-area retroreflection in planar optical systems remains a persistent challenge,constrained by the bulky nature of traditional designs like corner cube mirrors and cat’s eye retroreflectors.Here,we demonstrate a scalable metasurface-refractive retroreflector(MRR)that combines a refractive lens and meta-lens,achieving polarization-independent retroreflection with a half power field of view(FOV)of 70°and 88.5%efficiency at normal incident.The scalability of the MRR enables straightforward planar expansion into arrays,facilitating large-area effective retroreflection.Additionally,a moving object equipped with MRR is observed in a laser tracking experiment.The metasurface-refractive architecture evidently improves the functionality of the retroreflector,and paves a new path in the field of smart optical device design.
