Results 61 to 70 of about 659,213 (221)

Broadband Near‐Field Computational Microwave Imaging Enabled by Nonperiodic Dispersive Unit‐Cell Loading in a Passive Metasurface

Advanced Electronic Materials, EarlyView.
A compact passive engineered surface converts changes in microwave frequency into many distinct illumination patterns, allowing nearby objects to be imaged without mechanical scanning, active tuning, or a large antenna array. Operating from 18 to 28 GHz, the single‐port system uses measured field patterns to reconstruct metallic targets and distinguish
Mohammed H. Arif, Firas Slewa Dawod, Henrik Jansen, Caner Kadıoğlu, Sayan Roy, Dirk Heberling, Renato Negra   +6 more
wiley   +1 more source

Physical Unclonable Functions From Microwave Metasurface Fingerprints

Advanced Electronic Materials, EarlyView.
Nominally identical metasurfaces fabricated through standard PCB processes inevitably contain microscopic fabrication imperfections. This work demonstrates that these unavoidable electromagnetic deviations can serve as unique physical unclonable fingerprints for wireless authentication.
Guanxiong Shen, Jingyi Liang, Xinyu Li, Kezhan Zhao, Jian Wei You   +4 more
wiley   +1 more source

Holographic Mapping of Orbital Angular Momentum using a Terahertz Diffractive Optical Neural Network

Advanced Intelligent Discovery, EarlyView.
A compact six‐layer diffractive optical neural network enables direct recognition and spatial mapping of terahertz (THz) orbital angular momentum (OAM) beams. Fabricated by 3D printing, the system distinguishes nine OAM modes and their superpositions with high fidelity, good efficiency, and low crosstalk, offering a scalable solution for THz ...
Wei Jia, Miguel Gomez, Steve Blair, Berardi Sensale‐Rodriguez   +3 more
wiley   +1 more source

Lensless Scheme for Measuring Laser Aberrations Based on Computer-Generated Holograms

Sensors, 2020
All of the existing holographic wavefront sensors are either bulky or have low accuracy of measuring wavefront aberrations. In this paper, we present an improvement of the holographic method of measuring wavefront aberrations using computer-generated ...
George Krasin, Michael Kovalev, Nikita Stsepuro, Pavel Ruchka, Sergey Odinokov   +4 more
doaj   +1 more source

Formation of diffraction gratings in optically patternable hydrogel films

Nano Select, 2022
Local light‐induced material response forms the basis for volume holographic patterning of light‐responsive materials. This enables applications as multifunctional biomedical materials capable of integrating optical functions, such as for advanced ...
Tina Sabel‐Grau, Zhenfang Zhang, Rahima Rahman, Marga C. Lensen   +3 more
doaj   +1 more source

Clinically Informed Intelligent Classification of Ovarian Cancer Cells by Label‐Free Holographic Imaging Flow Cytometry

Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.
Quantitative phase maps of single cells recorded in flow cytometry modality feed a hierarchical architecture of machine learning models for the label‐free identification of subtypes of ovarian cancer. The employment of a priori clinical information improves the classification performance, thus emulating the clinical application of liquid biopsy during ...
Daniele Pirone, Beatrice Cavina, Daniele Gaetano Sirico, Martina Mugnano, Vittorio Bianco, Lisa Miccio, Anna Myriam Perrone, Anna Maria Porcelli, Giuseppe Gasparre, Ivana Kurelac, Pasquale Memmolo, Pietro Ferraro   +11 more
wiley   +1 more source

Liquid lens based holographic camera for real 3D scene hologram acquisition using end-to-end physical model-driven network

Light: Science & Applications
With the development of artificial intelligence, neural network provides unique opportunities for holography, such as high fidelity and dynamic calculation. How to obtain real 3D scene and generate high fidelity hologram in real time is an urgent problem.
Di Wang, Zhao-Song Li, Yi Zheng, You-Ran Zhao, Chao Liu, Jin-Bo Xu, Yi-Wei Zheng, Qian Huang, Chen-Liang Chang, Da-Wei Zhang, Song-Lin Zhuang, Qiong-Hua Wang   +11 more
doaj   +1 more source

Label-free viability assay using in-line holographic video microscopy

Scientific Reports, 2022
Total holographic characterization (THC) is presented here as an efficient, automated, label-free method of accurately identifying cell viability. THC is a single-particle characterization technology that determines the size and index of refraction of ...
Rostislav Boltyanskiy, Mary Ann Odete, Fook Chiong Cheong, Laura A. Philips   +3 more
doaj   +1 more source

Behaviorally Adaptive and Inclusive Advanced Driver‐Assistance Systems

Advanced Intelligent Systems, EarlyView.
Advanced driver‐assistance systems (ADASs) are mapped as evolving human‐centered, adaptive technologies linking sensing, driver monitoring, AR/HUD interfaces, patents, regulation, and inclusive design. The review identifies gaps in real‐world evidence, diverse‐driver validation, gaze metrics, and governance, outlining a roadmap for safer, behaviorally ...
Jana Skirnewskaja, Mardavij Roozbehani, Munther A. Dahleh   +2 more
wiley   +1 more source

Projection-Type Holographic Display With Observation Area Expanded Using Time-Division Reproduced Light Generation System

IEEE Access
Projection-type holographic displays are three-dimensional (3D) displays that utilize computer holography. These displays consist of a projection lens and a transparent holographic optical element (HOE) with off-axis concave mirror phase distribution and
Tomoki Kanno, Yasuyuki Ichihashi, Takashi Kakue, Koki Wakunami, Ryutaro Oi, Tomoyoshi Shimobaba, Tomoyoshi Ito   +6 more
doaj   +1 more source