Results 81 to 90 of about 3,087,724 (237)

Recent progress of the exchange bias based on 2D van der Waals ferromagnet

InfoScience, EarlyView.
Ultrathin magnetic materials could help make smaller, energy‐efficient memories, but their magnetic states must remain stable and controllable. This review brings together recent research on exchange bias, a magnetic pinning effect in layered materials, and explains how interfaces and electrical, thermal or mechanical controls can tune it, with optical
Wajahat Ali, Shaojie Hu
wiley   +1 more source

Simultaneous Generation of Complex Structured Curve Beam

Nanomaterials, 2019
At present, people are using holographic technologies to shape complex optical beams for both fundamental research and practical applications. However, most of the reported works are focusing on the generation of a single beam pattern based on the ...
Jun Wu, Xinquan Tang, Jun Xia
doaj   +1 more source

Shifted Fresnel diffraction for computational holography

Optics Express, 2007
Fourier-based approaches to calculate the Fresnel diffraction of light provide one of the most efficient algorithms for holographic computations because this permits the use of the fast Fourier transform (FFT). This research overcomes the limitations on sampling imposed by Fourier-based algorithms by the development of a fast shifted Fresnel transform.
Richard P, Muffoletto, John M, Tyler, Joel E, Tohline   +2 more
openaire   +2 more sources

Optimal Universal Bounds for Waves With Varied Coherence Based on Supremum and Infimum Coherence Spectra

Laser &Photonics Reviews, EarlyView.
Coherence variation is ubiquitous in nature, yet determining how it constrains physical observables remains challenging for multimode waves. To address this challenge, this work establishes a majorization‐based theory that identifies the supremum and infimum in the set of input coherence spectra, which provide optimal universal bounds for any linear ...
Shiyu Li, Cheng Guo
wiley   +1 more source

Generating Helical Polymorphic Beams Using Dielectric Metasurfaces

Laser &Photonics Reviews, EarlyView.
Helix‐shaped polymorphic beams are optical fields whose intensity maxima spiral around the propagation axis, enabling particle manipulation through attractive or repulsive forces. Traditionally requiring expensive spatial light modulators, metasurfaces now provide a compact, cost‐effective alternative. This work demonstrates general helical polymorphic
Maryam Setareh, Yang Xu, Jose A. Rodrigo, Kenneth B. Crozier   +3 more
wiley   +1 more source

Holography: A survey [PDF]

, 1973
The development of holography and the state of the art in recording and displaying information, microscopy, motion, pictures, and television applications are discussed.
Dudley, D. D.
core  

Reconfigurable Geometric Phase Matching by Multilayered Nonlinear Thin‐Film Crystals

Laser &Photonics Reviews, EarlyView.
The concept of geometric phase matching is demonstrated as a dynamically reconfigurable approach for tunable nonlinear wave mixing in multilayered nonlinear thin‐film crystals. Experimental results reveal full modulation in a bilayer structure and near‐perfect spin‐selective phase matching of second‐harmonic generation in an eight‐layer configuration ...
Danielle Ben‐Haim, Mai Tal, Xiaoxi Xu, Tal Ellenbogen   +3 more
wiley   +1 more source

Multiple-image encryption by compressive holography [PDF]

, 2012
We present multiple-image encryption (MIE) based on compressive holography. In the encryption, a holographic technique is employed to record multiple images simultaneously to form a hologram.
Di, H, Zhou, C, Lam, EY, Kim, T, Kim, YS, Zhang, X, Zheng, K, Poon, TC, Zhang, Xin, Di, Hong, Lam, Edmund Y., Kim, You Seok, Zheng, Kangfeng, Zhou, C. H., Kim, Taegeun, Poon, Ting-Chung   +15 more
core   +1 more source

Special-Purpose Computer for Holography HORN-X Enhanced With Separable Convolution Architecture

IEEE Access
Holographic displays employ computer-generated holograms (CGHs) and spatial light modulators to reproduce three-dimensional moving images. They are expected to serve as next-generation cross-reality (XR) or extended reality (XR) technologies.
Tomoki Kanno, Masato Shotoku, Noritomo Okamoto, Fan Wang, Tomoyoshi Shimobaba, Tomoyoshi Ito   +5 more
doaj   +1 more source

Compact Single‐Shot Incoherent Edge Detection With a Polarization‐Multiplexed Metalens

Laser &Photonics Reviews, EarlyView.
A polarization‐sensitive metalens enables single‐shot incoherent edge detection by generating two polarization‐dependent images and digitally subtracting them to realize a high‐pass optical transfer function. ABSTRACT Edge detection under incoherent illumination is highly desirable for compact vision systems but remains challenging due to the lack of ...
Weiyan Li, Xiaotong Li, Youngsun Jeon, Hyeonsu Heo, Jaekyung Kim, Gyeongtae Kim, Shiqi Hu, Minsu Jeong, Cherry Park, Seokho Lee, Le Dai, Mu Qiao, Qi Zheng, Zheng Zhu, Zhaogang Dong, Chunying Guan, Jinhui Shi, Junsuk Rho   +17 more
wiley   +1 more source