Results 71 to 80 of about 112,176 (189)

Topological aberration of optical vortex beams and singularimetry of dielectric interfaces

, 2012
The splitting of a high-order optical vortex into a constellation of unit vortices, upon total reflection, is described and analyzed. The vortex constellation generalizes, in a local sense, the familiar longitudinal Goos-H\"anchen and transverse Imbert ...
Dennis, Mark R., Götte, Jörg B.
core   +1 more source

Sub-Rayleigh optical vortex coronagraphy

Optics Express, 2012
We introduce a new optical vortex coronagraph (OVC) method to determine the angular distance between two sources when the separation is sub-Rayleigh. We have found a direct relationship between the position of the minima and the source angular separation. A priori knowledge about the location of the two sources is not required.
MARI, ELETTRA, TAMBURINI, FABRIZIO, G. A. Swartzlander J.r., BIANCHINI, ANTONIO, BARBIERI, CESARE, ROMANATO, FILIPPO, B. Thidé   +6 more
openaire   +2 more sources

Optical vortex braiding with Bessel beams

Optics Letters, 2020
We propose the braiding of optical vortices in a laser beam with more than 2 π rotation by superposing Bessel modes with a plane wave. We experimentally demonstrate this by using a Bessel–Gaussian beam and a coaxial Gaussian, and we present measurements of three complete braids. The amount of braiding is fundamentally limited only
Andrew A. Voitiv, Jasmine M. Andersen, Mark E. Siemens, Mark T. Lusk   +3 more
openaire   +3 more sources

Phase-conjugation of the isolated optical vortex using a flat surfaces

, 2014
The robust method for obtaining the helical interference pattern due to the phase-conjugation of an isolated optical vortex by means of the non-holographic technique is proposed.
A. Yu. Okulov, Allen, Arlt, Basistiy, Basov, Beth, Bhattacharya, Dennis, Felde, Hellwarth, Leach, Leach, MacDonald, Marchiano, Menachem, Nye, Okulov, Okulov, Okulov, Okulov, Okulov, Okulov, Puppe, Thiel, Veselago, Woerdemann, Zerrouki   +26 more
core   +1 more source

Second-harmonic generation in vortex-induced waveguides

, 2003
We study the second-harmonic generation and localization of light in a reconfigurable waveguide induced by an optical vortex soliton in a defocusing Kerr medium.
Andreas H. Carlsson, Bang, Carlsson, de la Fuente, Elena Ostrovskaya, Guo, José R. Salgueiro, Kang, Lan, Lan, Law, Luther-Davies, Morin, Swartzlander, Yuri Kivshar   +14 more
core   +2 more sources

Isolated optical vortex knots [PDF]

Nature Physics, 2010
Guided by a general framework for wavefront engineering, experiments demonstrate that in a light field, lines of zero intensity can be shaped into knotted and linked loops of arbitrary topology. Natural and artificially created light fields in three-dimensional space contain lines of zero intensity, known as optical vortices1,2,3.
Dennis, M.R, King, R.P, Jack, B, O'Holleran, K, Padgett, M.J   +4 more
openaire   +2 more sources

Customized Chirality of an Optical Vortex Pair: Helical Dichroism and Enantioselective Force

Photonics
Tailoring the chirality of an optical vortex is crucial for advancing helical chiroptical spectroscopy techniques in various scenarios and attracts great attention.
Xingxing Han, Haibo Niu, Jing Shi, Weili Dong, Jiajie Wang   +4 more
doaj   +1 more source

Generation of Optical Vortex Arrays Using Single-Element Reversed-Wavefront Folding Interferometer

International Journal of Optics, 2012
Optical vortex arrays have been generated using simple, novel, and stable reversed-wavefront folding interferometer. Two new interferometric configurations were used for generating a variety of optical vortex lattices.
Brijesh Kumar Singh, G. Singh, P. Senthilkumaran, D. S. Mehta   +3 more
doaj   +1 more source

Vortex Beam Encoded All-Optical Logic Gates Based on Nano-Ring Plasmonic Antennas

Nanomaterials, 2019
Vortex beam encoded all-optical logic gates are suggested to be very important in future information processing. However, within current logic devices, only a few are encoded by using vortex beams and, in these devices, some space optical elements with ...
Houquan Liu, Hongchang Deng, Shijie Deng, Chuanxin Teng, Ming Chen, Libo Yuan   +5 more
doaj   +1 more source

Real time magneto-optical imaging of vortices in superconductors

, 2001
We demonstrate here real-time imaging of individual vortices in a NbSe2 single crystal using polarized light microscopy. A new high-sensitivity magneto-optical (MO) imaging system enables observation of the static vortex lattice as well as single vortex ...
Eugene Il'yashenko, Harada K, Harald Hauglin, Michael Baziljevich, Peter L Gammel, Polyanskii A A, Pål Erik Goa, Tom H Johansen   +7 more
core   +1 more source