Results 31 to 40 of about 40,494 (294)
Dynamic beam steering with all-dielectric electro-optic III–V multiple-quantum-well metasurfaces
Nature Communications, 2019 Here, the authors demonstrate an electrically tunable metasurface with III–V semiconducting MQW structures as resonant metasurface elements. The amplitude and phase of the light reflected from the metasurface can be continuously tuned by applying DC ...
Pin Chieh Wu +8 more
doaj +1 more source
Control Electromagnetic Waves Based on Multi-Layered Transparent Metasurface
Frontiers in Physics, 2019 Metasurface was presented to be the two-dimensional analogs of metamaterials that regulate the beam by adjusting the phase and amplitude of the wavefront.
Zhichao Sun +3 more
doaj +1 more source
Highly Birefringent Terahertz Metasurfaces Based on a Liquid-Crystal-Embedded Metal Mesh
IEEE Photonics Journal, 2022 Here, we report a metasurface for polarization converters in the terahertz (THz) spectral range. The THz metasurface consists of a metal mesh with subwavelength isotropic apertures and a nematic liquid crystal (LC) that is a uniaxially anisotropic ...
Tomoyuki Sasaki +6 more
doaj +1 more source
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 +4 more sources
Hybrid Checkerboard Metasurface Combining Passive and Active AMCs [PDF]
Journal of Electromagnetic Engineering and ScienceIn this paper, a hybrid checkerboard metasurface is proposed for controlling radar cross-sections (RCSs) using a small number of active devices. The proposed metasurface consists of passive and active artificial magnetic conductors.
Sung Hoe Kim +3 more
doaj +1 more source
Light-emitting metasurfaces [PDF]
Nanophotonics, 2019 Abstract Photonic metasurfaces, that is, two-dimensional arrangements of designed plasmonic or dielectric resonant scatterers, have been established as a successful concept for controlling light fields at the nanoscale. While the majority of research so far has concentrated on passive metasurfaces, the direct integration of nanoscale ...
Aleksandr Vaskin +3 more
openaire +3 more sources
IEEE Access, 2019 In this paper, high-order orbital angular momentum (OAM) vortex beams (OAMVBs) are generated using reflective metasurface. Generating high-order OAMVBs using traditional reflective metasurface methods deteriorates the radiation performance that affects ...
Zaid Akram +7 more
doaj +1 more source
A Smart Metasurface for Electromagnetic Manipulation Based on Speech Recognition
Engineering, 2023 In this work, we propose and realize a smart metasurface for programming electromagnetic (EM) manipulations based on human speech recognition. The smart metasurface platform is composed of a digital coding metasurface, a speech-recognition module, a ...
Lin Bai +7 more
doaj +1 more source
Optics Express, 2022 We numerically study metasurfaces that incorporate electro-optic materials and show that they can achieve large amplitude and phase modulations across a distance that is a fraction of the operation wavelength. We show that the metasurfaces made of dielectric discs placed on a film of lithium niobate can exhibit three main types of resonances ...
Luyao Wang, Ilya Shadrivov
openaire +2 more sources
Design of Multifunctional Tunable Metasurface Assisted by Elastic Substrate
Nanomaterials, 2022 Metasurfaces with both multifunctionality and tunability hold great application potential in next-generation optical devices. In this paper, we propose a stretchable metasurface composed of arrays of identical dielectric rectangular resonators embedded ...
Jing Li +6 more
doaj +1 more source