Results 81 to 90 of about 107,392 (290)

Digital generation of partially coherent vortex beams

Optics Letters, 2016
We present an experimental technique to generate partially coherent vortex beams with an arbitrary azimuthal index using only a spatial light modulator. Our approach is based on digitally simulating the intrinsic randomness of broadband light passing through a spiral phase plate.
Benjamin, Perez-Garcia, Adad, Yepiz, Raul I, Hernandez-Aranda, Andrew, Forbes, Grover A, Swartzlander   +4 more
openaire   +2 more sources

Orbital angular momentum of partially coherent beams [PDF]

Optics Letters, 2001
The definition of the orbital angular momentum established for coherent beams is extended to partially coherent beams, expressed in terms of two elements of the beam matrix. This extension is justified by use of the Mercer expansion of partially coherent fields.
Serna Galán, Julio, Movilla Serrano, Jesús María   +1 more
openaire   +3 more sources

Full-dimensional complex coherence properties tomography for multi-cipher information security

Opto-Electronic Advances
Optical coherence is a fundamental property of light, playing a key role in understanding interference, propagation, and light-matter interactions for both classical and quantum light. Measuring the coherence properties of an optical field is crucial for
Yonglei Liu, Siting Dai, Yimeng Zhu, Yahong Chen, Peipei Peng, Yangjian Cai, Fei Wang   +6 more
doaj   +1 more source

Generation of an Adjustable Optical Cage through Focusing an Apertured Bessel-Gaussian Correlated Schell-Model Beam

Applied Sciences, 2019
An adjustable optical cage generated by focusing a partially coherent beam with nonconventional correlation function named the Bessel⁻Gaussian correlated Schell-model (BGCSM) beam is investigated in detail. With the help of the generalized Huygens&#
Lina Guo, Li Chen, Rong Lin, Minghui Zhang, Yaru Gao, Yangjian Cai   +5 more
doaj   +1 more source

Cooperative atomic scattering of light from a laser with a colored noise spectrum

, 2009
The collective atomic recoil lasing is studied for an ultra-cold and collisionless atomic gas in a partially coherent pump with a colored noise. Compared to white noise, correlations in colored noise are found to be able to greatly enhance or suppress ...
Zhou, Xiaoji
core   +1 more source

In Situ Micromechanical Study of Bimodal γ′–γ″ Precipitate Assemblies in Ni–Cr–Al–Nb Superalloy

Advanced Engineering Materials, EarlyView.
A Ni–Cr–Al–Nb superalloy with a bimodal γ′–γ″ precipitate distribution is developed. Composite precipitate assemblies form through heterogeneous nucleation, effectively impeding dislocation motion. Micropillar compression reveals high strength at room and elevated temperatures, governed by precipitate shearing, with coupled faulting mechanisms ...
Ujjval Bansal, Tae‐Hyeok Kang, Pyuck‐Pa Choi, Subin Lee, Christoph Kirchlechner   +4 more
wiley   +1 more source

Nonparaxial Propagation Properties of Specially Correlated Radially Polarized Beams in Free Space

Applied Sciences, 2019
A specially correlated radially polarized (SCRP) beam with unusual physical properties on propagation in the paraxial regime was introduced and generated recently.
Lina Guo, Li Chen, Rong Lin, Minghui Zhang, Yiming Dong, Yahong Chen, Yangjian Cai   +6 more
doaj   +1 more source

Effect of atmospheric turbulence on propagation properties of optical vortices formed by using coherent laser beam arrays

, 2008
In this paper, we consider the effect of the atmospheric turbulence on the propagation of optical vertex formed from the radial coherent laser beam array, with the initially well-defined phase distribution.
Andrews L C, Desyatnikov A S, Li-Gang Wang, Nye J F, Soskin M S, Wei-Wei Zheng   +5 more
core   +1 more source

An Experimental High‐Throughput Approach for the Screening of Hard Magnet Materials

Advanced Engineering Materials, EarlyView.
An entire workflow for the high‐throughput characterization and analysis of compositionally graded magnetic films is presented. Characterization protocols, data management tools and data analysis approaches are illustrated with test case Sm(Fe, V)12 based films.
William Rigaut, Pierre Le Berre, Hamdi Jaballah, Lukas Fink, Victor Poline, Richard Haettel, Stéphane Grenier, Gilbert Chahine, Ewen Bellec, Guillaume Buatier, Wilfried Hortschitz, Santa Pile, Thomas Schrefl, Nils Blanc, Yuan Hong, Thibaut Devillers, Nora M. Dempsey   +16 more
wiley   +1 more source

Demonstration of an All‐Optical AND Gate Mediated by Photochromic Molecules

Advanced Functional Materials, EarlyView.
A logic AND gate that runs on photons is demonstrated. It relies on two spatially separated photochromic molecules that work in tandem. Abstract The realization of a photonic logic AND gate, i.e. a logic AND gate that runs on photons rather than electrons, and where all steps are controlled by light, is demonstrated. In a proof‐of‐principle experiment,
Heyou Zhang, Max Gießübel, Pankaj Dharpure, Andrea Albert, Vira Niestierkina, Paul Mulvaney, Mukundan Thelakkat, Jürgen Köhler   +7 more
wiley   +1 more source