Results 241 to 250 of about 556,769 (269)

Wavefront manipulation in imaging: when blurry is better

Frontiers in Optics, 2003
Traditional imaging system design places a priority on correcting the exit pupil wavefront to produce a sharp image at the plane of detection. This paper discusses applications where system performance is improved by manipulating the wavefront to differ from a converging spherical wave.
Harsha Setty, Gary W. Euliss, Joe van der Gracht, Todd C. Torgersen, Sudhakar Prasad, V. P. Pauca, Robert J. Plemmons   +6 more
openaire   +2 more sources

MetaFly: Wireless Backhaul Interception via Aerial Wavefront Manipulation

IEEE Symposium on Security and Privacy
Wireless backhaul links, already ubiquitous and expanding further with 5G and beyond, are employed for many critical functions, such as financial trading on Wall Street.
Zhambyl Shaikhanov, Sherif Badran, H. Guerboukha, J. Jornet, Daniel M. Mittleman, Edward W. Knightly   +5 more
semanticscholar   +1 more source

Ultra-broadband high-efficiency circular polarization conversion and terahertz wavefront manipulation based on an all-metallic reflective metasurface.

Applied Optics, 2022
In this paper, an all-metal metasurface (MS), which can achieve high-efficient reflective circular-polarization conversion and multifunctional terahertz (THz) wavefront manipulation in an ultra-broadband frequency range, is proposed and investigated ...
Muchen Wang, Yongzhi Cheng, Ling Wu
semanticscholar   +1 more source

A transformation elasticity based device for wavefront manipulation

NDT & E International, 2019
Abstract The authors propose a metamaterial plate made of gradient refractive index phononic crystals for manipulation of the wavefront of propagating elastic waves in solid media. A square unit cell with through holes is considered as the basis for the proposed metematerial.
Sai Aditya Raman Kuchibhatla, Prabhu Rajagopal   +1 more
openaire   +2 more sources

Broadband manipulation of acoustic wavefronts by pentamode metasurface

Applied Physics Letters, 2015
An acoustic metasurface with a sub-wavelength thickness can manipulate acoustic wavefronts freely by the introduction of abrupt phase variation. However, the existence of a narrow bandwidth and a low transmittance limits further applications. Here, we present a broadband and highly transparent acoustic metasurface based on a frequency-independent ...
Ying Cheng, Ye Tian, Xiaojun Liu, Xiaojun Liu, Qi Wei, Zheng Xu   +5 more
openaire   +2 more sources

THz wavefront manipulation based on metal waveguides

Journal of Modern Optics, 2018
In this paper, two waveguiding structures for arbitrary wavefront manipulation in the terahertz spectral region were proposed, designed and characterized.
Mengru Wu, Tingting Lang, Changyu Shen, Guohua Shi, Zhanghua Han   +4 more
openaire   +2 more sources

Broadband and efficient asymmetric wavefront manipulation via terahertz polarization-selective metasurface

Applied Physics Letters, 2022
Asymmetric manipulation of electromagnetic waves exhibits tremendous capabilities in the applications of encryption, ultrafast information processing, and communication.
Yan Wang, Shaohe Li, Hui Wang, Longcheng Feng, Bowen Tan, Yihui Tan, R. Su, Jingbo Wu, Caihong Zhang, B. Jin, Jian Chen, Peiheng Wu   +11 more
semanticscholar   +1 more source

Metagratings for underwater acoustic wavefront manipulation

INTER-NOISE and NOISE-CON Congress and Conference Proceedings
Metagratings are flat periodic assemblies of small scatterers, engineered to achieve effects such as steering, beamforming, or absorption. They have recently received attention in both electromagnetism and acoustic fields.
Hasna Kourchi, Simon Bernard, F. Chati, Fernand LéON   +3 more
semanticscholar   +1 more source

Metagratings for wavefronts manipulation: theory and design

2023
International ...
Tan, Zhen, Yi, Jianjia, Ratni, Badreddine, Burokur, Shah Nawaz   +3 more
openaire   +2 more sources

Two-dimensional graphene metasurfaces for wavefront manipulation

2016 Progress in Electromagnetic Research Symposium (PIERS), 2016
Two dimensional graphene metasurfaces working in terahertz regime are proposed to realize dynamical control of wavefront with high efficiency. Each graphene metasurface consists of an array of graphene rectangle patches on square grounded dielectric substrate.
Wu Yang, Wei-Bing Lu, Zhen-Guo Liu, Ji Long Liu, Jian Wang, Xiao Bing Li   +5 more
openaire   +2 more sources