Journal ArticleDOI
Conversion between polarization states based on a metasurface
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TLDR
In this paper, a simple and compact polarization converters based on rectangular holes or cross holes etched in silver film are designed, and polarization conversions from the linear and circular polarization to the radial and azimuthal polarization are realized.Abstract:
Transmission of an anisotropic metasurface is analyzed in a polar base relying on the Jones calculus, and polarization conversion from the spatial uniform polarization to the spatial nonuniform polarization is explored. Simple and compact polarization converters based on rectangular holes or cross holes etched in silver film are designed, and polarization conversions from the linear and circular polarization to the radial and azimuthal polarization are realized. Numerical simulations of three designed polarization converters consisting of rectangular holes equivalent to polarizers and quarter- and half-wave plates, exhibit the perfect polarization conversion. The experiment results consistent with the simulations verify theoretic predictions. This study is helpful for designing metasurface polarization converters and expanding the application of a metasurface in polarization manipulations.read more
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Multifocal metalens with a controllable intensity ratio
TL;DR: The numerical simulations give the good presentation, and the experiment measurement provides the favorable verification for the performance of the proposed multifocal metalens in light focusing and beam splitting.
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Free control of far-field scattering angle of transmission terahertz wave using multilayer split-ring resonators' metasurfaces
TL;DR: In this article, the Fourier convolution principle on encoding metasurface sequences was applied to the checkerboard coded metAsurfaces to achieve the continuous variation of the scattering angle.
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Metasurface cylindrical vector light generators based on nanometer holes
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Perfect Control of Diffraction Patterns with Phase-Gradient Metasurfaces.
Yuxiang Wang,Yueyi Yuan,Guohui Yang,Xumin Ding,Qun Wu,Yannan Jiang,Shah Nawaz Burokur,Kuang Zhang +7 more
TL;DR: In this article , the authors proposed a general method to perfectly control diffraction patterns based on a multi-beam PGM, which can be used to design multiple-beam antennas and that has significance in wireless communication applications.
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Switchable efficiency terahertz anomalous refraction and focusing based on graphene metasurface
TL;DR: In this paper , a split-ring resonators (SRRs) structure has been proposed and investigated numerically, which can achieve the highly efficiency switchability of anomalous refraction and planar focuing effects.
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Planar Photonics with Metasurfaces
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Journal ArticleDOI
Metalenses at visible wavelengths: Diffraction-limited focusing and subwavelength resolution imaging.
Mohammadreza Khorasaninejad,Wei Ting Chen,Robert C. Devlin,Jaewon Oh,Alexander Y. Zhu,Federico Capasso +5 more
TL;DR: The results firmly establish that metalenses can have widespread applications in laser-based microscopy, imaging, and spectroscopy, with image qualities comparable to a state-of-the-art commercial objective.