Results 51 to 60 of about 556,769 (269)
Advanced Optical Materials, 2023 Reconfigurable metasurfaces exhibit the capability of flexibly controlling electromagnetic (EM) waves, and the real‐time manipulation of tailored EM wavefront in full‐space is one of the steadily increasing interests. This paper proposes a reconfigurable
Tao Yin +5 more
semanticscholar +1 more source
Photonics, 2023 As a promising platform for versatile electromagnetic (EM) manipulations, metasurfaces have drawn wide interest in recent years due to their unique EM properties and small footprints.
Jie Hu +8 more
doaj +1 more source
Pupil wavefront manipulation for optical nanolithography [PDF]
SPIE Proceedings, 2012 As semiconductor lithography is pushed to smaller dimensions, process yields tend to suffer due to subwavelength topographical imaging effects. Three dimensional or "thick mask" effects result in such things as a pitch dependent best focus and, for alternating phase shift masks (AltPSMs), an intensity imbalance between etched and un-etched features.
Bruce W. Smith +2 more
openaire +1 more source
Meta-Gratings: Beyond the Limits of Graded Metasurfaces for Wavefront Control [PDF]
Phys. Rev. Lett. 119, 067404 (2017), 2017 Graded metasurfaces exploit the local momentum imparted by an impedance gradient to transform the impinging wavefront. This approach suffers from fundamental limits on the overall conversion efficiency and it is challenged by fabrication limitations on the maximum spatial resolution.
arxiv +1 more source
Anomalous wavefront control via nonlinear acoustic metasurface through second-harmonic tailoring and demultiplexing [PDF]
, 2022 We propose a nonlinear acoustic metasurface concept by exploiting the nonlinearity of the locally resonant unit cells formed by curved beams. The analytical model is established to explore the nonlinear phenomenon, specifically the second-harmonic generation (SHG) of the acoustic waveguide and validated through numerical and experimental studies. Novel
arxiv +1 more source
Advanced Photonics Research, 2022 Wavefront shaping of structured light beams is attracting considerable attention in optics and related technologies. Due to the potential benefits, it is crucial to develop versatile methods for controlling the wavefront in a compact space with the ...
Yuji Sasaki +4 more
doaj +1 more source
Wavefront Manipulation Attack via Programmable mmWave Metasurfaces: from Theory to Experiments
Wireless Network Security, 2023 Reconfigurable surfaces enable on-demand manipulation of electromagnetic wave properties in a controllable manner. These surfaces have been shown to enhance mmWave wireless networks in many ways, including blockage recovery. In this paper, we investigate
Haoze Chen +4 more
semanticscholar +1 more source
Scientific Reports, 2022 The paper presents the results of a comprehensive study on the optimization of independent amplitude and phase wavefront manipulation which is implemented using a binary digital micromirror device. The study aims to investigate the spatial resolution and
Alexandra Georgieva +2 more
doaj +1 more source
Underwater Transmitted Wavefront Manipulation Based on Bubble-Arrayed Acoustic Metasurfaces
Frontiers in Physics, 2022 Manipulating underwater acoustic waves along the prescribed trajectory has great potential for various applications. Traditional metasurfaces for underwater acoustic modulation usually have complex structural designs and are complicated to manufacture ...
Zhimin Li +4 more
doaj +1 more source
The Future of Intelligent Wavefront Shaping for Smart Radio Environments [PDF]
arXiv, 2021 As the electromagnetic spectrum becomes more congested and the environments in which we need to operate become more complicated, control over the environment itself becomes necessary to ensure the integrity of wireless communication channels. Wavefront shaping with programmable metasurfaces allows wave fields to be manipulated in both time and space ...
arxiv