Results 11 to 20 of about 41,755 (180)

Topological charge of a superposition of identical parallel single-ringed Laguerre-Gaussian beams

open access: yesКомпьютерная оптика, 2022
We study a superposition of several identical parallel single-ringed Laguerre-Gaussian beams. Both for the initial plane and for the far field, we show analytically and confirm numerically that if the weighting coefficients of the superposition are real ...
V.V. Kotlyar   +2 more
doaj   +2 more sources

Tailoring the Topological Charge of a Superposition of Identical Parallel Laguerre–Gaussian Beams

open access: yesMicromachines, 2022
In optical computing machines, data can be transmitted by optical vortices, and the information can be encoded by their topological charges. Thus, some optical mechanisms are needed for performing simple arithmetic operations with the topological charges.
Victor V. Kotlyar   +3 more
doaj   +3 more sources

Pseudo-spin light circuits in nonlinear photonic crystals [PDF]

open access: yesNature Communications
Guiding light forms the backbone of numerous photonic circuits that allow complex, robust, and miniaturized light control. Commonly, guiding is achieved by modifying linear permittivity, resulting in a non-homogeneous linear medium.
Ofir Yesharim, Shani Izhak, Ady Arie
doaj   +2 more sources

Dynamic Phase and Polarization Modulation Using Two-Beam Parallel Coding for Optical Storage in Transparent Materials

open access: yesSensors, 2022
In this paper, we propose and experimentally demonstrate a parallel coding and two-beam combining approach for the simultaneous implementation of dynamically generating holographic patterns at their arbitrary linear polarization states.
Jintao Hong, Jin Li, Daping Chu
doaj   +1 more source

On the Presence and Thermalization of Cold Ions in the Exhaust of Antiparallel Symmetric Reconnection

open access: yesFrontiers in Astronomy and Space Sciences, 2021
Using fully kinetic 2.5 dimensional particle-in-cell simulations of anti-parallel symmetric magnetic reconnection, we investigate how initially cold ions are captured by the reconnection process, and how they evolve and behave in the exhaust.
Cecilia Norgren    +9 more
doaj   +1 more source

Solar Concentrator Bio-Inspired by the Superposition Compound Eye for High-Concentration Photovoltaic System up to Thousands Fold Factor

open access: yesEnergies, 2022
We have proposed a fruitful design principle targeting a concentration ratio (CR) >1000× for a typical high concentrating photovoltaics (HCPV) system, on account of a two-concentrator system + homogenizer.
Duc Tu Vu   +6 more
doaj   +1 more source

Response of Composite Beam Structure under Unbalanced Excitation of Rice Threshing System

open access: yesShock and Vibration, 2022
This paper studies the dynamic response of the support beam under the unbalanced excitation of the rice threshing system. The differential equation of motion of the supporting beam under the action of harmonic force is established by the modal ...
Xujun Zhai   +5 more
doaj   +1 more source

Two-Grating Talbot Bands Spectral Domain Interferometer [PDF]

open access: yes, 2015
A configuration for Talbot bands is presented, where two tilted gratings replace the splitter normally used for recombining the signals from the two interferometer arms.
Bradu, Adrian   +2 more
core   +1 more source

Electron vortex beams in a magnetic field: A new twist on Landau levels and Aharonov-Bohm states

open access: yes, 2012
We examine the propagation of the recently-discovered electron vortex beams in a longitudinal magnetic field. We consider both the Aharonov-Bohm configuration with a single flux line and the Landau case of a uniform magnetic field.
A. Tonomura   +6 more
core   +5 more sources

The gravitational interaction of light: from weak to strong fields [PDF]

open access: yes, 1998
An explanation is proposed for the fact that pp-waves superpose linearly when they propagate parallely, while they interact nonlinearly, scatter and form singularities or Cauchy horizons if they are antiparallel.
C. M. Will   +20 more
core   +2 more sources

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