Results 81 to 90 of about 70,205 (364)
Metasurface polarization splitter [PDF]
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2017 Polarization beam splitters, devices that separate the two orthogonal polarizations of light into different propagation directions, are among the most ubiquitous optical elements. However, traditionally polarization splitters rely on bulky optical materials, while emerging optoelectronic and photonic circuits require compact, chip-scale polarization ...
Brian A. Slovick +7 more
openaire +6 more sources
Molding of Reflection and Scattering from Uniform Walls Using Space-Periodic Metasurfaces [PDF]
arXiv, 2023 Active development is taking place in reconfigurable and static metasurfaces that control and optimize reflections. However, existing designs typically only optimize reflections from the metasurface panels, neglecting interference with reflections originating from supporting walls and nearby objects in realistic scenarios.
arxiv
Singular graphene metasurfaces [PDF]
EPJ Applied Metamaterials, 2019 The spatial tunability of the electron density in graphene enables the dynamic engineering of metasurfaces in the form of conductivity gratings, which can bridge the momentum gap between incident radiation and surface plasmons. Here, we discuss singular graphene metasurfaces, whose conductivity is strongly suppressed at the grating valleys.
Emanuele Galiffi +2 more
openaire +4 more sources
Chiral Metasurface Multifocal Lens in the Terahertz Band Based on Deep Learning
Micromachines, 2023 Chiral metasurfaces have garnered significant interest as an emerging field of metamaterials, primarily due to their exceptional capability to manipulate phase distributions at interfaces.
Jingjing Wang +5 more
doaj +1 more source
A Surrogate-Assisted Extended Generative Adversarial Network for Parameter Optimization in Free-Form Metasurface Design [PDF]
arXiv, 2023 Metasurfaces have widespread applications in fifth-generation (5G) microwave communication. Among the metasurface family, free-form metasurfaces excel in achieving intricate spectral responses compared to regular-shape counterparts. However, conventional numerical methods for free-form metasurfaces are time-consuming and demand specialized expertise ...
arxiv
Remotely mind-controlled metasurface via brainwaves
eLight, 2022 The power of controlling objects with mind has captivated a popular fascination to human beings. One possible path is to employ brain signal collecting technologies together with emerging programmable metasurfaces (PM), whose functions or operating modes
Ruichao Zhu +11 more
semanticscholar +1 more source
Scientific Reports, 2022 A broadband metasurface flat lens is proposed as a polarization-independent wideband superstrate for wave focusing and gain enhancement at Ka-band. The proposed metasurface structure consists of four metal layers and is designed with diagonally symmetric
Kanghyeok Lee +8 more
doaj +1 more source
A Four-leaf Clover-shaped Coding Metasurface For Ultra-wideband Diffusion-like Scattering
Leida xuebao, 2021 In this paper, a novel four-leaf clover-shaped coding metasurface is proposed and applied to achieve an ultra-wideband diffusion-like scattering.
Saifullah YASIR, Guomin YANG, Feng XU
doaj +1 more source
Dynamic Metasurface Antennas for 6G Extreme Massive MIMO Communications [PDF]
IEEE wireless communications, 2020 Next generation wireless base stations and access points will transmit and receive using an extremely massive numbers of antennas. A promising technology for realizing such massive arrays in a dynamically controllable and scalable manner with reduced ...
Nir Shlezinger +4 more
semanticscholar +1 more source
Micromachines, 2022 In the terahertz band, how integrating multiple functions into a device with a tiny unit structure is a challenge. In this paper, an optically-controlled multifunctional linear polarization conversion metasurface working in the terahertz band is proposed.
Ying Tian +5 more
doaj +1 more source