Chinese Optics Letters, 2018, 16 (5): 050003, Published Online: Jul. 4, 2018
High-efficiency multi-wavelength metasurface with complete independent phase control Download: 853次
Abstract
As a consequence of Kramers–Kronig relations, the wavelength-dependent behavior of the metasurface is one of the critical limitations in existing metasurface structures, which reduces the design freedom among different wavelengths. Here, we present an approach to construct a high-efficiency multi-wavelength metasurface with independent phase control by coding different wavelengths into orthogonal polarizations. As proof of the concept, two dual-band metasurfaces have been proposed and numerically demonstrated by multiple vortex beam generation in near-field and polarization multiplexing achromatic beam deflection. Furthermore, simulated results show that the proposed metasurface exhibits high transmission efficiency at both wavelengths, which may find widespread applications in subwavelength electromagnetics.
Jing Yan, Yinghui Guo, Mingbo Pu, Xiong Li, Xiaoliang Ma, Xiangang Luo. High-efficiency multi-wavelength metasurface with complete independent phase control[J]. Chinese Optics Letters, 2018, 16(5): 050003.