Results 71 to 80 of about 28,100 (252)
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 +8 more
wiley +1 more source
A data extraction system for underwater particle holography [PDF]
, 2000 Pulsed laser holography is an extremely powerful technique for the study of particle fields as it allows instantaneous, noninvasive high-resolution recording of substantial volumes.
Nebrensky, JJ +7 more
core
Identification and Size Estimation of Non-Spherical Nanoparticles using Polarization-Resolved Holography [PDF]
, 2020 Dual-view polarization-resolved digital holography is used to record the polarization response of the scattered light from both spherical and non-spherical nanoparticles. A model based on the T-matrix method is developed to map the polarization to a size
Sjödahl, Mikael,, Öhman, Johan,
core +1 more source
Generation of Optical Vortex Arrays Using Single-Element Reversed-Wavefront Folding Interferometer
International Journal of Optics, 2012 Optical vortex arrays have been generated using simple, novel, and stable reversed-wavefront folding interferometer. Two new interferometric configurations were used for generating a variety of optical vortex lattices.
Brijesh Kumar Singh +3 more
doaj +1 more source
Journal of High Energy Physics, 2010 Aging phenomena are examples of `non-equilibrium criticality' and can be exemplified by systems with Galilean and scaling symmetries but no time translation invariance. We realize aging holographically using a deformation of a non-relativistic version of gauge/gravity duality.
Jottar, Juan I. +3 more
openaire +3 more sources
A General and Efficient Framework for the Rapid Design of Miniaturized, Wideband, and High‐Bit RIS
Advanced Electronic Materials, EarlyView.A general and efficient framework is proposed for the rapid design of high‐performance reconfigurable intelligent surfaces (RISs). This framework integrates advanced antenna design techniques and incorporates various load types, quantities, and values to achieve the design of high‐performance RISs.
Jun Wei Zhang +14 more
wiley +1 more source
Quantifying Particle Volumes with Photon-counting Digital Holography [PDF]
, 2023 We propose a photon-counting digital holography method to accurately reconstruct particle volumes in low light conditions. Our approach integrates a Poisson digital holography model into an unrolled network, overcoming the challenges of shot noise and ...
Huang, Jianqing +4 more
core +1 more source
Recent Advances in Programmable Metasurfaces and Meta‐Devices
Advanced Electronic Materials, EarlyView.Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao +4 more
wiley +1 more source
Holography: art with light [PDF]
, 2015 “It’s the intersection of art, science, and technology that makes holography so interesting,” stated Stephen Benton (1941-2003), a key figure in the development of modern holography not only on account of his scientific achievements (such as the ...
Beléndez, Augusto +1 more
core
Depth enhancement of optical scanning holography with a spiral phase plate [PDF]
, 2015 A spiral phase plate is applied to the optical scanning holography system to improve the depth resolution of the reconstruction, the simulation results show that the depth interval can be resolved at a 0.4 mm with only a single hologram.
Antony Chan +9 more
core +1 more source