Results 121 to 130 of about 556,769 (269)
Scattering optical elements: stand-alone optical elements exploiting multiple light scattering [PDF]
arXiv, 2016 Optical design and fabrication techniques are crucial for making optical elements. From conventional lenses to diffractive optical elements, and to recent metasurfaces, various types of optical elements have been proposed to manipulate light where optical materials are fabricated into desired structures.
arxiv
Random-access multi-focus manipulation through superpixel-encoding wavefront engineering [PDF]
, 2022 Gaoyu Zou +7 more
openalex +1 more source
Advanced Physics Research, EarlyView.A conformal transmissive metasurface with the multi‐function is introduces, which could transform y‐polarized waves into right‐handed circularly polarized waves in 6.8–10.3 GHz and to left‐handed circularly polarized waves in 18.77–21.15 GHz, while vice versa for x‐polarized waves.
Zhihao Li +7 more
wiley +1 more source
Recent Advances in Dielectric Chiral Metasurfaces
Advanced Physics Research, EarlyView.This review article mainly focuses on the recent advances in dielectric chiral metasurfaces, which exhibit remarkable optical chirality. Many new physical conceptions will be introduced during the fast development of the dielectric chiral metasurfaces, such as chiral quasi‐BIC, chiral guided modes, and nonlocal metasurfaces.
Zhipeng Hu +6 more
wiley +1 more source
SDF‐Guided Point Cloud Generation Framework for Mesh‐Free CFD
International Journal for Numerical Methods in Fluids, EarlyView.This paper presents different methods for generating clouds of points around objects for use with meshless methods in computational fluid dynamics. This image shows the cloud generated around the original ROBIN body. ABSTRACT Meshing is a bottleneck of CFD workflows, especially when complex geometries are considered.
Tao Zhang, George N. Barakos
wiley +1 more source
PhotonicsWe present extended capabilities in simple liquid crystal-based devices that are applicable to adaptive optics and other related fields requiring wavefront manipulation.
Alec Xu +5 more
doaj +1 more source
Sensing Dog Brain Reactions to Smell by AI Speckle Pattern Analysis
Journal of Biophotonics, EarlyView.The setup of our experiment is shown on Labrador, Johny, a canine participant of our research. The schematic of the setup features: green laser, digital camera, source of smell, and computer. Regions of the brain that were tested are highlighted. Note that the hippocampus and amygdala are on both sides of the dog's brain.
Ilana Propp +5 more
wiley +1 more source
Analytical Study of Optical Wavefront Aberrations Using Maple [PDF]
arXiv, 1997 This paper describes a package for analytical ray tracing of relatively simple optical systems. AESOP (An Extensible Symbolic Optics Package) enables analysis of the effects of small optical element misalignments or other perturbations. (It is possible to include two or more simultaneous independent perturbations.) Wavefront aberrations and optical ...
arxiv
Gradient Nonlinear Pancharatnam-Berry Metasurfaces [PDF]
arXiv, 2015 We apply the Pancharatnam-Berry phase approach to plasmonic metasurfaces loaded by highly nonlinear multi-quantum well substrates, establishing a platform to control the nonlinear wavefront at will based on giant localized nonlinear effects. We apply this approach to design flat nonlinear metasurfaces for efficient second-harmonic radiation, including ...
arxiv
Coherence Awareness in Diffractive Neural Networks
Laser &Photonics Reviews, EarlyView.It is demonstrated that spatial coherence significantly impacts all‐optical diffractive neural networks, unlike imaging systems. A general framework is proposed for training diffractive networks for any specified degree of spatial and temporal coherence. Coherence‐blind networks are further introduced, which are resilient to illumination changes. These
Matan Kleiner +2 more
wiley +1 more source