Results 41 to 50 of about 63,217 (287)

Metamaterials for Ballistic Electrons [PDF]

, 2007
The paper presents a metamaterial for ballistic electrons, which consists of a quantum barrier formed in a semiconductor with negative effective electron mass.
D. Dragoman, Dragoman M., M. Dragoman
core   +2 more sources

Highly tunable low frequency metamaterial cavity for vibration localization

Scientific Reports, 2022
Metamaterial cavity has gathered much attention recently due to its capability of localizing vibration energy. Despite the active research, however, there are still big technical challenges not solved yet.
Hong Woo Park, Hong Min Seung, Wonjae Choi, Miso Kim, Joo Hwan Oh   +4 more
doaj   +1 more source

Polarization-maintaining reflection-mode THz time-domain spectroscopy of a polyimide based ultra-thin narrow-band metamaterial absorber [PDF]

, 2018
This paper reports the design, the microfabrication and the experimental characterization of an ultra-thin narrow-band metamaterial absorber at terahertz frequencies.
Astorino, Maria Denise, Fastampa, Renato, Frezza, Fabrizio, Maiolo, Luca, Marrani, Marco, Missori, Mauro, Muzi, Marco, Tedeschi, Nicola, Veroli, Andrea   +8 more
core   +2 more sources

Estimating number of group targets arranged in linear array via forward‐backward matrix pencil method

IET Radar, Sonar & Navigation, 2023
An efficient number estimation method is proposed for target detection by using the forward‐backward matrix pencil method. Compared with the traditional parameter estimation methods, the proposed method can work well even for sparse signals.
Xiyuan Sun, Shixi Li, Pengfei Gu, Zi He, Dazhi Ding, Shaoqing Guo, You Li   +6 more
doaj   +1 more source

Tunable Electromagnetically Induced Transparent Window of Terahertz Metamaterials and Its Sensing Performance

Applied Sciences, 2022
The electromagnetically induced transparency effect of terahertz metamaterials exhibits excellent modulation and sensing properties, and it is critical to investigate the modulation effect of the transparent window by optimizing structural parameters. In
Zhenlin Wu, Peiyao An, Menghan Ding, Yanan Qi, Lin Zhang, Shaoshuai Han, Di Lian, Changming Chen, Xin Yang   +8 more
doaj   +1 more source

Microwave modes of ambidextrous helices

Scientific Reports
This work presents an investigation into the electromagnetic properties of ambidextrous helices, structures composed of equal numbers of left- and right-handed turns, operating in the gigahertz frequency range.
J. Gudge-Brooke, N. Clow, A. P. Hibbins, A. W. Powell, J. R. Sambles   +4 more
doaj   +1 more source

Structural design and optimization of double-cross shape broadband absorption metamaterial based on CB-ABS

Frontiers in Materials, 2022
This work presents a novel broadband double-cross shape metamaterial structure based on the Carbon Black-Acrylonitrile-Butadiene-Styrene (CB-ABS) composite material.
Mengzhou Chen, Liuying Wang, Gu Liu, Chaoqun Ge, Long Wang, Kejun Xu, Weichao Wang   +6 more
doaj   +1 more source

Characterization of Nitinol Produced by Laser Powder Bed Fusion for Mechanical Metamaterial Applications

Advanced Engineering Materials, EarlyView.
Stabilization of L‐PBF Ni50.7Ti49.3 under low‐cycle loading was investigated. Recoverable strain after cycling was dependent on the amount of applied load. Recovery ratio was 53.4% and 35.1% at intermediate and high load, respectively. The maximum total strain reached 10.3% at a high load of 1200 MPa.
Ondřej Červinek, Jakub Hurník, Miroslav Šmíd, Ondřej Zobač, Melanie Todt, Daniel Koutný   +5 more
wiley   +1 more source

Zero electromagnetic coupling of closely spaced identical helical resonators

Scientific Reports
The interaction between closely spaced elements in an electromagnetic array typically leads to significant inter-element coupling, altering the resonance properties of each element.
J. Gudge-Brooke, N. Clow, A. P. Hibbins, A. W. Powell, J. R. Sambles   +4 more
doaj   +1 more source

Emulation of metamaterial waveguides

Algerian Journal of Signals and Systems, 2018
In this work, we are interested by emulating metamaterial microwave waveguides which behave like conventional metallic ones. We use metamaterial layers based on two types of unit cells.
Khedidja BOURAS, Abdelhadi LABIAD, Chaker SALEH, Mouloud BOUZOUAD   +3 more
doaj   +1 more source