Results 171 to 180 of about 101,447 (298)

Asymmetrically Nonlinear Generation of Optical Orbital Angular Momentum via Cooperation of Bragg Diffraction and Birefringent Phase Matching

Laser &Photonics Reviews, EarlyView.
Nonlinear orbital angular momentum (OAM) manipulation is crucial for fundamental physics and information technologies. An integrated lithium niobate platform combining Bragg diffraction and birefringent phase matching asymmetrically generates and controls second‐harmonic OAM beams, achieving a normalized conversion efficiency of 10−2 W−1 and supports a
Xinyu Liu, Chun Chang, Yuntao Mo, Dingwei Liu, Dan Wei, Juntao Li, Dunzhao Wei, Xuehua Wang   +7 more
wiley   +1 more source

Noise reduction of electron holography observations for a thin-foiled Nd-Fe-B specimen using the wavelet hidden Markov model

Applied Microscopy
In this study, we investigate the effectiveness of noise reduction in electron holography, based on the wavelet hidden Markov model (WHMM), which allows the reasonable separation of weak signals from noise.
Sujin Lee, Yoshihiro Midoh, Yuto Tomita, Takehiro Tamaoka, Mitsunari Auchi, Taisuke Sasaki, Yasukazu Murakami   +6 more
doaj   +1 more source

Holography with non-coherent light [PDF]

, 1973
Byung Jin Chang
openalex   +1 more source

Effect of Post‐Deposition Annealing on Atomic Ordered Structure of Gallium Oxide Layer at SiO2/GaN Interface

physica status solidi (b), EarlyView.
Photoelectron holograms and scanning transmission electron microscope images show that the gallium oxide layer at the SiO2/GaN interface is single‐atomic layer and has the same atomic arrangement as the native oxide film on the GaN. Analysis of the holograms indicates that the gallium oxide layer is damaged during the deposition of SiO2, but the damage
Mutsunori Uenuma, Ryota Atsumi, Kentaro Onishi, Hiroto Tomita, Shougo Yamada, Yuya Yamada, Momoko Yoshida, Zexu Sun, Yusuke Hashimoto, Mami N. Fujii, Takuma Kobayashi, Heiji Watanabe, Tomohiro Matsushita, Yukiharu Uraoka   +13 more
wiley   +1 more source

Nonlinear Transformation of Images and Infrared Holography [PDF]

, 1970
É.S. Voronin
openalex   +1 more source

Magnetic Hopfions as Local Rotations of the Uniform Magnetization Background

physica status solidi (RRL) – Rapid Research Letters, EarlyView.
The Hopf mapping of 3D coordinate space to the unit sphere m2 = 1 in the magnetization space m(r) can be parametrized by some angles. These angles are used to define a local rotation matrix to restore the hopfion magnetization configuration from the uniformly magnetized state for any Hopf indices.
Konstantin Y. Guslienko
wiley   +1 more source

Properties of depolarizing diffusors by autocorrelation (holography) [PDF]

, 1978
Yves Rézette
openalex   +1 more source

Terahertz Quantum Imaging

Advanced Quantum Technologies, EarlyView.
The presented quantum imaging technique allows the measurement of spatial amplitude, phase, and spectral information of terahertz radiation after interaction with a sample by only detecting visible photons with a standard, uncooled camera. It offers a promising alternative to traditional terahertz imaging methods like electro‐optical and upconversion ...
Mirco Kutas, Felix Riexinger, Jens Klier, Daniel Molter, Georg von Freymann   +4 more
wiley   +1 more source

Decimeter-depth and polarization addressable color 3D meta-holography

Nature Communications
Fueled by the rapid advancement of nanofabrication, metasurface has provided unprecedented opportunities for 3D holography. Large depth 3D meta-holography not only greatly increases information storage capacity, but also enables distinguishing of the ...
Di Wang, Yi-Long Li, Xin-Ru Zheng, Ruo-Nan Ji, Xin Xie, Kun Song, Fan-Chuan Lin, Nan-Nan Li, Zhao Jiang, Chao Liu, Yi-Wei Zheng, Shao-Wei Wang, Wei Lu, Bao-Hua Jia, Qiong-Hua Wang   +14 more
doaj   +1 more source

Beam-modulation methods in quantitative and flow visualization holographic interferometry [PDF]

This report discusses heterodyne holographic interferometry and time-average holography with a frequency shifted reference beam. Both methods will be used for the measurement and visualization of internal transonic flows, where the target facility is a ...
Decker, A.
core   +1 more source