Results 31 to 40 of about 70,205 (364)
Parametric Testing of Metasurface Stirrers for Metasurfaced Reverberation Chambers [PDF]
Sensors, 2019 In this paper, the correlation coefficients and the total scattering cross sections (TSCSs) for different types of metasurfaced stirrers and the traditional metallic stirrer, and the effects on field uniformity when such stirrers are used in reverberation chambers, are analyzed.
Hengyi Sun +9 more
openaire +7 more sources
A Review on Metasurface: From Principle to Smart Metadevices
Frontiers of Physics, 2021 Metamaterials are composed of periodic subwavelength metallic/dielectric structures that resonantly couple to the electric and magnetic fields of the incident electromagnetic waves, exhibiting unprecedented properties which are most typical within the ...
Jie Hu +3 more
semanticscholar +1 more source
Optical secret sharing with cascaded metasurface holography [PDF]
Science Advances, 2021 The secret of a holographic image can be shared across two closely stacked metasurface holograms. Secret sharing is a well-established cryptographic primitive for storing highly sensitive information like encryption keys for encoded data.
P. Georgi +6 more
semanticscholar +1 more source
A Differential Modulation Scheme for Metasurface-Based Terahertz Communications
Frontiers in Communications and Networks, 2021 Metasurface-based terahertz (THz) modulators, which carry information by changing the spatial pattern of the metasurface at every symbol time, are an important component to establish low-cost low-energy–consuming THz communication systems.
Shuaishuai Guo, Jia Ye, Peng Zhang
doaj +1 more source
Design of Planar and Conformal, Passive, Loss-less Metasurfaces that Beamform [PDF]
, 2021 A general technique for synthesizing both planar and conformal beamforming metasurfaces is presented that utilizes full-wave modeling techniques and rapid optimization methods. The synthesized metasurfaces consist of a patterned metallic cladding supported by a finite-size grounded dielectric substrate.
arxiv +1 more source
Controllable Manipulation of Wi-Fi Signals Using Tunable Metasurface
Leida xuebao, 2021 In this paper, we propose the utilization of a programmable metasurface for flexibly manipulating ambient Wi-Fi signals. First, we propose a new and efficient optimization algorithm CWGS (Complex Weighted Gerchberg-Saxton), which is based on an ...
Ya SHUANG +4 more
doaj +1 more source
Journal of Optics, 2019 Abstract Metasurfaces are thin two-dimensional metamaterial layers that allow or inhibit the propagation of electromagnetic waves in desired directions. For example, metasurfaces have been demonstrated to produce unusual scattering properties of incident plane waves or to guide and modulate surface waves to obtain desired radiation ...
Nikitas Papasimakis +34 more
openaire +10 more sources
Nature Reviews Materials, 2018 Acoustic metasurfaces derive their characteristics from the interaction between acoustic waves and specifically designed materials. The field is driven by the desire to control acoustic wave propagation using compact devices and is governed by fundamental and physical principles that provide the design rules and the functionality of a wave.
Badreddine Assouar +5 more
openaire +4 more sources
Design of a wideband random phase gradient metasurface by using line-shaped element
Journal of Advanced Dielectrics, 2020 Based on phase randomization theory, a method for manufacturing metasurface with diffuse scatter performance is proposed. By using the line-shaped elements with random rotate angles and random distributing positions, the metasurface can achieve good ...
Jiangniu Wu +5 more
doaj +1 more source
Conformable Holographic Metasurfaces [PDF]
Scientific Reports, 2017 AbstractMetasurface holograms are typically fabricated on rigid substrates. Here we experimentally demonstrate broadband, flexible, conformable, helicity multiplexed metasurface holograms operating in the visible range, offering increased potential for real life out-of-the-lab applications.
James Burch +3 more
openaire +6 more sources