Results 81 to 90 of about 5,651,449 (268)
Metasurface‐Based Multidimensional Light‐Field Manipulation: From Technologies to Applications
Advanced Science, EarlyView.Multidimensional metasurfaces enable versatile manipulation of multiple optical degrees of freedom, including phase, amplitude, polarization, wavelength, and orbital angular momentum. This review summarizes their fundamental mechanisms, emerging strategies for multidimensional light‐field control, and key applications in optical computing, imaging ...
Heliang Yin +6 more
wiley +1 more source
Spin‐Polarized Metallic Metal−Organic Framework With High Conductivity and Half‐Metallic Behavior
Advanced Science, EarlyView.By establishing a progression from insulating to semiconducting and ultimately to metallic MOFs, this study not only introduces a new design paradigm based on quantum spin‐polarized electronic structures, but also represents a significant breakthrough toward the realization of next‐generation conductive materials.
Saqib Kamal +13 more
wiley +1 more source
A Deep Learning Framework for Multi-Plane Computer-Generated Holography
PhotonicsMulti-plane computer-generated holography is a key technology for enabling volumetric and near-eye displays. However, its widespread adoption remains constrained by the high computational cost of phase optimization and the persistent issue of axial ...
Jiafeng Zeng +5 more
doaj +1 more source
ETRI Journal, 2019 A fast hologram calculation approach is proposed to reduce computational load by avoiding the recalculation of redundancy information. In the proposed method, the hologram is divided into several sub‐holograms that record and reconstruct different views ...
Jia Jia, Jhensi Chen, Daping Chu
doaj +1 more source
An Adaptive and Secure Holographic Image Watermarking Scheme
Entropy, 2019 A novel adaptive secure holographic image watermarking method in the sharp frequency localized contourlet transform (SFLCT) domain is presented. Based upon the sine logistic modulation map and the logistic map, we develop an encrypted binary computer ...
Chuying Yu +3 more
doaj +1 more source
Conformal Reconfigurable Intelligent Surfaces: A Cylindrical Geometry Perspective
Advanced Electronic Materials, EarlyView.Cylindrical reconfigurable intelligent surfaces are explored for low‐complexity beam steering using one‐bit meta‐atoms. A multi‐level modeling approach, including optimization‐based synthesis, demonstrates that even minimal hardware can support directive scattering.
Filippo Pepe +4 more
wiley +1 more source
Applied Sciences, 2019 Holographic three-dimensional (3D) displays can reconstruct a whole wavefront of a 3D scene and provide rich depth information for the human eyes. Computer-generated holographic techniques offer an efficient way for reconstructing holograms without ...
Hao Zhang, Liangcai Cao, Guofan Jin
doaj +1 more source
Measuring position and figure deviation of freeform mirrors with computer generated holograms
, 2022 Paper FT3B.2A novel interferometric metrology using a multi-zone computer generated hologram for determining position and figure deviations of two anamorphic aspherical mirrors arranged on a common substrate is ...
Zeitner, U.D. +8 more
core +1 more source
Terahertz Channel Modeling, Estimation and Localization in RIS‐Assisted Systems
Advanced Electronic Materials, EarlyView.Reconfigurable intelligent surfaces have become a recent intensive research focus. Based on practical applications, channel strategies for RIS‐assisted terahertz wireless communication systems are categorized into three different types: channel modeling, channel estimation, and channel localization.
Hongjing Wang +9 more
wiley +1 more source
Generating Multi‐Depth 3D Holograms Using a Fully Convolutional Neural Network
Advanced ScienceEfficiently generating 3D holograms is one of the most challenging research topics in the field of holography. This work introduces a method for generating multi‐depth phase‐only holograms using a fully convolutional neural network (FCN).
Xingpeng Yan +9 more
doaj +1 more source