Results 31 to 40 of about 410,028 (288)

Orbital angular momentum: origins, behavior and applications [PDF]

open access: yes, 2011
As they travel through space, some light beams rotate. Such light beams have angular momentum. There are two particularly important ways in which a light beam can rotate: if every polarization vector rotates, the light has spin; if the phase structure ...
Padgett, M.J.   +5 more
core   +1 more source

Studies of novel beam shapes and applications to optical manipulation [PDF]

open access: yes, 2011
Electronic redacted version excludes material for which permission has not been granted by the rights holderIn this thesis an investigation into novel beams and optical manipulation is presented.
Morris, Jill E.
core   +2 more sources

Review on vortex beams with low spatial coherence

open access: yesAdvances in Physics: X, 2019
Vortex beams with helical phase, carrying phase singularity and orbital angular momentum, have attract great attention in the past decades due to their wide applications in optical communications, optical manipulation, super-resolution imaging and so on.
Xianlong Liu, Jun Zeng, Yangjian Cai
doaj   +1 more source

Peculiar rotation of electron vortex beams [PDF]

open access: yesUltramicroscopy, 2015
Standard electron optics predicts Larmor image rotation in the magnetic lens field of a TEM. Introducing the possibility to produce electron vortex beams with quantized orbital angular momentum brought up the question of their rotational dynamics in the presence of a magnetic field. Recently, it has been shown that electron vortex beams can be prepared
Schachinger, T.   +3 more
openaire   +4 more sources

Multimode vector beam synthesis and rapid modulation via interferometric methods [PDF]

open access: yesAIP Advances
Optical interference techniques are widely regarded as an effective approach for generating vector beams. In this paper, we theoretically simulate the generation of multimode vector beams through the vortex beams interference. Then, in the experiment, we
Qiyou Huang   +7 more
doaj   +1 more source

Vortex Beams for Atomic Resolution Dichroism [PDF]

open access: yesMicroscopy and Microanalysis, 2011
Extended abstract of a paper presented at Microscopy and Microanalysis 2011 in Nashville, Tennessee, USA, August 7–August 11, 2011.
Juan C, Idrobo, Stephen J, Pennycook
openaire   +3 more sources

A highly adaptive three dimensional hybrid vortex method for inviscid flows and helically symmetric vortex equilibria [PDF]

open access: yes, 2012
This thesis is concerned with three-dimensional vortex dynamics, in particular the modelling of vortex structures in an inviscid context. We are motivated by the open problem of regularity of the inviscid equations, i.e.
Lucas, Daniel
core   +2 more sources

Optics-to-THz conversion of vortex beams using nonlinear difference frequency generation [PDF]

open access: yesКомпьютерная оптика, 2019
In this paper, using a modified model of slowly varying amplitudes, a process of optics-to-THZ-conversion of vortex beams based on the nonlinear difference frequency generation in a medium with second-order susceptibility is considered.
Valeriy Bagmanov   +7 more
doaj   +1 more source

Multichannel polarization-independent vortex beams generation via all-dielectric metasurface

open access: yes, 2023
Generating structured light beams has become a research hotspot to target many emerging practical applications like optical sensing, super-resolution imaging, and optical communication. Ingenious tailoring of spatial structures of light helps to manifest
Massoud, Yehia Mahmoud   +3 more
core   +1 more source

Multi-mode interactions in vortex-induced vibrations of flexible curved/straight structures with geometric nonlinearities [PDF]

open access: yes, 2010
A general low-order fluid-structure interaction model capable of evaluating the multi-mode interactions in vortex-induced vibrations of flexible curved/straight structures is presented.
Srinil, N.
core   +4 more sources

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