Results 51 to 60 of about 537,168 (232)

Magnonic Metamaterials for Spin-Wave Control with Inhomogeneous Dzyaloshinskii–Moriya Interactions

Nanomaterials, 2022
A magnonic metamaterial in the presence of spatially modulated Dzyaloshinskii–Moriya interaction is theoretically proposed and demonstrated by micromagnetic simulations.
Fengjun Zhuo, Hang Li, Zhenxiang Cheng, Aurélien Manchon   +3 more
doaj   +1 more source

Scalable Design and Optimization of Reconfigurable Sb2S3 Metasurfaces

Advanced Optical Materials, EarlyView.
Scalable optimization methodologies are developed for reconfigurable Sb2S3 Huygens metasurfaces by combining localized phase‐match and overlap‐integral cost functions that account for inter‐element coupling. The framework enables computationally efficient design of large‐area, dual‐state flat optical devices with arbitrary wavefront transformations ...
Siddharth Padmanabha, Isaac O. Oguntoye, Matthew Escarra   +2 more
wiley   +1 more source

Determination of Spectral Focusing Features of a Metamaterial Slab [PDF]

, 2009
The realization of flat superlenses is a major application area of metamaterials. A slab of double negative (DNG) material is capable of imaging with a resolution below the diffraction limit.
Russer, Peter, Culhaoglu, Ali Eren, Osipov, Andrey   +2 more
core  

Modified MXene Aerogel With Broadband Microwave Absorption Inspired by Melanophila Acuminata Beetle

Advanced Science, EarlyView.
This work introduces a novel biomimetic strategy inspired by the infrared‐sensing sensilla of the Melanophila acuminata beetle. We have designed a multi‐level aerogel, featuring a three‐dimensional carbon framework decorated with synergistic CeO2 nanoparticles and Ti3C2Tx MXene nanosheets.
Zhiwei Liu, Dingyu Xu, Zhaobo Liu, Haitian Song, Qianqian Zhang, Junxiao Zhou, Xiewen Wen   +6 more
wiley   +1 more source

All-dielectric invisibility cloaks made of BaTiO3-loaded polyurethane foam [PDF]

, 2011
Transformation optics has led the way in the development of electromagnetic invisibility cloaks from science fiction to engineering practice. Invisibility cloaks have been demonstrated over a wide range of the electromagnetic spectrum, and with a variety
Yang Hao, Kallos, Efthymios, Khalid Z Rajab, Bao, D, Hao, Y, Tang, WX, Yang, SF, Argyropoulos, C, Tang, Wenxuan, Di Bao, Christos Argyropoulos, Shoufeng Yang, Rajab, Khalid Z., Bao, Di, Efthymios Kallos, Bao, D., Piao, YZ, Argyropoulos, C., Yongzhe Piao, Piao, Yongzhe, Hao, Y., Kallos, E, Hao, Yang, Tang, W.X., Rajab, KZ, Piao, Y.Z., Kallos, E., Yang, Shoufeng, Argyropoulos, Christos, Rajab, K.Z., Wenxuan Tang   +30 more
core   +1 more source

3D field-shaping lens using all-dielectric gradient refractive index materials

Scientific Reports, 2017
A novel three-dimensional (3D) optical lens structure for electromagnetic field shaping based on spatial light transformation method is proposed at microwave frequencies.
Tongyu Ding, Jianjia Yi, Haoyu Li, Hailin Zhang, Shah Nawaz Burokur   +4 more
doaj   +1 more source

Three-Dimensional Broadband and Isotropic Double-Mesh Twin-Wire Media for Meta-Lenses

Applied Sciences, 2021
Lenses are used for multiple applications, including communications, surveillance and security, and medical instruments. In homogeneous lenses, the contour is used to control the electromagnetic propagation.
Hairu Wang, Qiao Chen, Oskar Zetterstrom, Oscar Quevedo-Teruel   +3 more
doaj   +1 more source

Hierarchical Physical‐Cyber Encryption via Metasurface‐Encoded Holographic Keys

Advanced Science, EarlyView.
ABSTRACT Physical‐layer encryption based on metasurfaces has emerged as a promising alternative to conventional algorithmic cryptography by embedding security into physical processes. However, most existing metasurface‐based encryption schemes operate within single‐stage or static frameworks, where correct physical illumination directly reveals the ...
Zhen Liu, Changhong Dai, Wei Zhu, Ruisheng Yang, Bohan Zhang, Lei Zhang, Bobo Du, Shengxiang Wang, Guangwei Hu   +8 more
wiley   +1 more source

Twin‐Lever Multifunctional Meta‐Optics With High Longitudinal Tolerance

Advanced Science, EarlyView.
We introduce a single‐layer, CMOS‐compatible metasurface that allows for polarization‐programmable, achromatic broadband dual‐mode imaging with high longitudinal tolerance. The twin‐lever design combines bright‐field focusing and vortex‐based edge‐enhanced imaging while managing axial intensity distribution from 488 to 633 nm.
Isma Javed, Kyungtae Kim, Aqib Raza Shah, Dohyun Kang, Joohoon Kim, Azhar Javed Satti, Xuefeng Liu, Muhammad Zubair, Jichuan Xiong, Muhammad Qasim Mehmood, Junsuk Rho   +10 more
wiley   +1 more source

Time-varying metamaterials and metasurfaces for antennas and propagation applications

, 2021
In this contribution we present the most recent results from our group about the opportunities offered by time-varying metamaterials and metasurfaces for conceiving antenna systems and devices exhibiting artificial non-reciprocity, frequency conversion ...
Bilotti F., Ramaccia D., Toscano A.
core   +1 more source