Open AccessA Fully Phase‐Modulated Metasurface as An Energy‐Controllable Circular Polarization Router
Author(s) -
Yuan Yueyi,
Sun Shang,
Chen Yang,
Zhang Kuang,
Ding Xumin,
Ratni Badreddine,
Wu Qun,
Burokur Shah Nawaz,
Qiu ChengWei
Publication year - 2020
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202001437
Subject(s) - wavefront , polarization (electrochemistry) , geometric phase , circular polarization , physics , optics , waveplate , phase (matter) , planar , computer science , quantum mechanics , laser , chemistry , computer graphics (images) , microstrip
Geometric metasurfaces primarily follow the physical mechanism of Pancharatnam–Berry (PB) phases, empowering wavefront control of cross‐polarized reflective/transmissive light components. However, inherently accompanying the cross‐polarized components, the copolarized output components have not been attempted in parallel in existing works. Here, a general method is proposed to construct phase‐modulated metasurfaces for implementing functionalities separately in co‐ and cross‐polarized output fields under circularly polarized (CP) incidence, which is impossible to achieve with solely a geometric phase. By introducing a propagation phase as an additional degree of freedom, the electromagnetic (EM) energy carried by co‐ and cross‐polarized transmitted fields can be fully phase‐modulated with independent wavefronts. Under one CP incidence, a metasurface for separate functionalities with controllable energy repartition is verified by simulations and proof‐of‐principle microwave experiments. A variety of applications can be readily expected in spin‐selective optics, spin‐Hall metasurfaces, and multitasked metasurfaces operating in both reflective and transmissive modes.