Results 31 to 40 of about 63,217 (287)
Optica, 2020 We report the theoretical prediction and experimental realization of the optical phenomenon of “ballistic resonance.” This resonance, resulting from the interplay between free charge motion in confining geometries and periodic driving electromagnetic fields, can be utilized to achieve negative permittivity at frequencies well above the bulk plasma ...
Kun Li +6 more
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Optical Anapole Metamaterial [PDF]
ACS Nano, 2018 The toroidal dipole is a localized electromagnetic excitation independent from the familiar magnetic and electric dipoles. It corresponds to currents flowing along minor loops of a torus. Interference of radiating induced toroidal and electric dipoles leads to anapole, a nonradiating charge-current configuration.
Pin Chieh Wu +10 more
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A Novel Method for Enhancement of Gain Bandwidth of a Hybrid 3-State Reconfigurable Reflectarray Metasurface Antenna [PDF]
Journal of Electromagnetic Engineering and ScienceThis paper proposes a novel method for enhancing the gain bandwidth of hybrid 3-state reconfigurable reflectarray metasurface antennas (RRMAs) containing passive unit cells.
Yong-Hyun Nam, Jeong-Hae Lee
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Applied Sciences, 2022 Recently, layered-beam metamaterial structures have been gaining popularity in a variety of engineering applications including energy harvesting and vibration isolation.
Winner Anigbogu, Hamzeh Bardaweel
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Reconfigurable Photonic Metamaterials [PDF]
Nano Letters, 2011 We introduce mechanically reconfigurable photonic metamaterials (RPMs) as a flexible platform for realizing metamaterial devices with reversible and large-range tunable characteristics in the optical part of the spectrum. Here we illustrate this concept for a temperature-driven RPM exhibiting reversible relative transmission changes of up to 50%.
Ou, Jun-Yu +3 more
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Perfect Metamaterial Absorber [PDF]
Physical Review Letters, 2008 We present the design for an absorbing metamaterial element with near unity absorbance. Our structure consists of two metamaterial resonators that couple separately to electric and magnetic fields so as to absorb all incident radiation within a single unit cell layer. We fabricate, characterize, and analyze a metamaterial absorber with a slightly lower
Landy, N. I. +4 more
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Results in Physics, 2019 We present terahertz (THz) metamaterial with multi-configurations, which are composed of H-shaped, II-shaped, and IHI-shaped configurations, respectively.
Xiao Zhang, Yu-Sheng Lin
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Plasmon induced transparency in graphene based terahertz metamaterials
, 2017 Plasmon induced transparency (PIT) effect in a terahertz graphene metamaterial is numerically and theoretically analyzed. The proposed metamaterial comprises of a pair of graphene split ring resonators placed alternately on both sides of a graphene strip
Chowdhury, Dibakar R. +4 more
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Coding Metamaterials, Digital Metamaterials and Programming Metamaterials
, 2014 As artificial structures, metamaterials are usually described by macroscopic effective medium parameters, which are named as "analog metamaterials". Here, we propose "digital metamaterials" in two steps. Firstly, we present "coding metamaterials" that are composed of only two kinds of unit cells with 0 and phase responses, which we name as "0" and ...
Cui, Tie Jun +4 more
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Metamaterial Based Circular Disc Patch Antenna Miniaturization
Advanced Electromagnetics, 2018 A novel metamaterial structure has been proposed for its operation at 2.4 GHz. A circular disc patch antenna resonating at dual band frequency with 2.4 GHz and 3.36 GHz has been designed using full field solver CST MWS tool and the loading effect of the ...
V. Kumar, Y. Wu
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