Different types of efficiencies are introduced for metasurface (MTS) antennas based on single point-source excitation: 1) the feed efficiency εfeed is the power delivered by the feed to surface wave (SW) over the input power; 2) the tapering efficiency εtap quantifies the deviation with ...
This paper presents two methods for the efficient evaluation of the power balance in circular metasurface (MTS) antennas implementing arbitrary modulated surface impedances on a grounded dielectric slab. Both methods assume the surface current in the homogenized MTS to be known. The first technique re...
Using a metasurface comprising an array of nanorods with different orientations and a backreflector, a hologram image can be obtained in the visible and near-infrared with limited loss of light intensity. Surfaces covered by ultrathin plasmonic structure
High-gain broadband ENZ metasurface-based RF lens with gradient refractive index for microwave and millimetre-wave applications microstrip\npatch antenna and horn antenna both in simulation and measurement\nwhile maintaining the total efficiency of the antenna being used with the lens... SP Narjala,VR...
To enhance the efficiency of wireless power transmission for the implanted medical system, a human body surface conformal phase gradient metasurface (PGMS) has been designed in this letter. Based on geometric phase modulation, the PGMS can convert the spherical wave from the transmitting antenna into...
the design of the metasurface proposed in this study introduces an air gap between the antennas and the surrounding media that confines the field within the gap,which mitigates the crosstalk between meta-atoms and minimizes metallic absorption.The proposed metasurface is broadband,versatile,easy ...
Considering the orthogonality of the incident waves, there can be a total of four independent space channels to excite SSP on one metasurface. This work may open up new routes in multi-channel SSP meta-couplers and multi-beam surface wave antennas. 展开 ...
An ultra-wideband and high-efficiency polarization rotator based on a metasurface is proposed in this paper. The unit cell of the proposed polarization rotator consists of two pairs of L-shaped metallic patches printed on a substrate, which is backed by a metallic ground and covered by a supers...
increasing the transmission efficiency of GMs using the Huygens metasurface approach remains challenging. Other few-layer structures have been reported to have high transmission49,50. For example, by introducing two orthogonal gratings before and after a layer of metallic antennas, high-transmission PMs...
Here we report the simulation results of an optical trapping concept, in whic... AS Ang,AS Shalin,A Karabchevsky - 《Optics Letters》 被引量: 0发表: 2020年 Aluminum Metasurface with Hybrid Multipolar Plasmons for 1000-Fold Broadband Visible Fluorescence Enhancement and Multiplexed Biosensing ...