Results 101 to 110 of about 410,028 (288)

ELLIPTICAL VORTEX BEAMS THROUGH TURBULENT ATMOSPHERE [PDF]

, 2021
"In this work, simulations of propagation of helical Ince-Gauss beams, elliptical solutions of the paraxial wave equation that carry orbital angular momentum, were performed in order to investigate how the nature of these modes affect their performance ...
Emmanuel Narváez Castañeda
core  

Resonant Domain Wall Dynamics in a Three‐Dimensional Magnetic Nano Double Helix

Advanced Materials, EarlyView.
3D magnetic nanostructures promise exciting possibilities for magnetization dynamics. However, experimental realizations remain scarce. In nanoprinted cobalt double helices, time‐resolved X‐ray microscopy reveals harmonic domain wall dynamics. Simulations identify the mode and additional higher‐frequency resonances, revealing a rich dynamic landscape ...
Pamela Morales‐Fernández, Iason Konstantinos‐Douveas, Claas Abert, Elina Zhakina, Sandra Ruiz‐Gómez, Claudia Fernández‐González, Luke Alexander Turnbull, Sebastian Wintz, Markus König, Simone Finizio, Markus Weigand, Naëmi Leo, Dieter Suess, Aurelio Hierro‐Rodríguez, Amalio Fernández‐Pacheco, Claire Donnelly   +15 more
wiley   +1 more source

Unveiling Exsolution‐Induced Giant Electronic and Magnetic Property Changes in Non‐Stoichiometric Titanate Perovskite Thin Films

Advanced Materials, EarlyView.
A giant insulator to metal transition and emergent superparamagnetism are revealed by nanoparticle exsolution in non‐stoichiometric titanate perovskite thin films. By combining transport, synchrotron spectroscopy, and first‐principles calculations, this work reveals how defect reconfiguration and lattice reconstruction fundamentally reshape electronic ...
Sungil Kim, June Ho Lee, Yaolong Xing, Dongchang Kim, Haeseong Jeong, Mongjun Jeong, Manuel Valvidares, Stuart S. P. Parkin, Sang Ho Oh, Donghwa Lee, Hyojin Yoon, Hyeon Han   +11 more
wiley   +1 more source

Versatile broadband generation of polygonal perfect vortex beams in the visible spectrum

Optical vortex (OV) beams characterized by their twisted wave phase and the orbital angular momentum (OAM) have garnered significant interest and found practical utility in diverse applications like optical communication, particle manipulation, and many ...
Cabrera, Humberto, Abbasi, Qammer H., Shafqat, Muhammad Danial, Zubair, Muhammad   +3 more
core   +1 more source

Knotted and linked phase singularities in monochromatic waves

, 2001
Exact solutions of the Helmholtz equation are constructed, possessing wavefront dislocation lines (phase singularities) in the form of knots or links where the wave function vanishes ('knotted nothings').
Dennis, MR, Berry, MV, M. V. Berry, Dennis, M.R., M. R. Dennis, Berry, M.V., Berry, M. V., Dennis, M. R.; id_orcid   +7 more
core   +1 more source

Stochastic forcing of the Lamb–Oseen vortex [PDF]

, 2008
The aim of the present paper is to analyse the dynamics of the Lamb–Oseen vortex when continuously forced by a random excitation. Stochastic forcing is classically used to mimic external perturbations in realistic configurations, such as variations of ...
Fontane, Jérôme, Brancher, Pierre, Fabre, David   +2 more
core   +1 more source

Noise‐Tunable Memristor Enabling Programmable Probabilistic Neurons for Frequency‐Selective Time‐Series Signal Encoding

Advanced Materials, EarlyView.
Memristors offer tunable resistance and intrinsic instability, making them promising tunable noise sources. We propose a spiking‐rate‐programmable probabilistic neuron using a Ru/TaOx/Pt memristor, where resistance‐dependent noise enables frequency‐selective encoding.
Do Hoon Kim, Seoeun Jang, Hakseung Rhee, Min Gu Lee, Daehee Kim, Taewook Go, Woon Hyung Cheong, Hanchan Song, Kyung Min Kim   +8 more
wiley   +1 more source

Generation of Four-Channel Multi-Polarization Bessel Vortex Beams with Equal Divergence Angle Based on Co-Aperture Metasurface

Photonics
This paper proposes a co-aperture reflective metasurface that successfully generates four-channel Bessel vortex beams with equal divergence angle in both Ka and Ku bands.
Zhiwei Wang, Yongzhong Zhu, Jun Chen, Wenxuan Xie   +3 more
doaj   +1 more source

Atomic‐Scale Detection of Néel Vector Switching in the Single‐Layer A‐Type Antiferromagnet Cr2S3‐2D

Advanced Materials, EarlyView.
Interfacial electron donation from graphene redistributes charge within single‐layer Cr2S3‐2D, preferentially accumulating at the lower Cr/S plane. The resulting minute magnetic imbalance lifts the equivalence of the two magnetic sublayers, enabling atomic‐resolution identification and field‐induced control of Néel‐vector states in a two‐dimensional A ...
Affan Safeer, Calisa Dias, Mahdi Ghorbani‐Asl, Abdallah Karaka, Pradyumna Bawankule, Weibin Li, Pierluigi Gargiani, Wouter Jolie, Arkady V. Krasheninnikov, Amilcar Bedoya‐Pinto, Thomas Michely, Jeison Fischer   +11 more
wiley   +1 more source

Pulsed polarized vortex beam enabled by metafiber lasers

PhotoniX
Pulsed polarized vortex beams, a special form of structured light, are generated by tailoring the light beam spatiotemporally and witness the growing application demands in nonlinear optics such as ultrafast laser processing and surface plasma excitation.
Chenxi Zhang, Lei Zhang, He Zhang, Bo Fu, Jiyong Wang, Min Qiu   +5 more
doaj   +1 more source