Results 31 to 40 of about 4,913,708 (237)
Communications in PhysicsA silicon spiral phase plate was proposed for a pulsed terahertz beam to produce orbital angular momentum with a topological charge of \(l=1\). The resulting field distribution after the terahertz pulse traverses the silicon spiral phase plate was ...
Kenneth Jay Alaba +3 more
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Orbital angular momentum of an elliptically symmetric laser beam after passing an elliptical spiral phase plate [PDF]
Компьютерная оптика, 2018 We obtain a simple closed expression for the normalized orbital angular momentum (OAM) (OAM per unit power) of an arbitrary paraxial light beam of an elliptical cross-section, diffracted by an elliptical spiral phase plate (SPP), rotated by an arbitrary ...
Alexey Kovalev
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Verifica sperimentale delle prestazioni di una Spiral Phase Plate [PDF]
, 2022 Optical vortex (OV) are singularity of phase of a wavefront that takes a helical shape in the axis of propagation. A device called Spiral Phase Plate that, thanks to its shape can give the right phase shift for the generation of an OV.
Consolaro, Luca
core
Results in Optics, 2021 An optical vortex beam (OVB) is obtained when a Gaussian beam is transmitted through an appropriately designed spiral phase plate (SPP). The OVB can be deformed in its optical intensity and phase distributions by displacements of the optical axis of the ...
Miki Kitazawa, Kyoko Kitamura, Shogo Ura
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Spatial Dynamics of a Radially Polarized Terahertz Laser Beam with a Phase Singularity
East European Journal of PhysicsAnalytical expressions are obtained that describe the nonparaxial diffraction in free space of the TM01 mode with radial polarization of the field of the dielectric waveguide resonator of a terahertz laser during its interaction with a spiral phase plate
Andrey V. Degtyarev +4 more
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Evolution of Vector Vortex Beams Formed by a Terahertz Laser Metal Resonator
East European Journal of PhysicsAnalytical expressions for the nonparaxial mode diffraction of a terahertz laser metal waveguide resonator are obtained. The study assumes interaction between the modes and a spiral phase plate, considering different topological charges (n).
Andrey V. Degtyarev +4 more
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Generation of terahertz optical skyrmion by interference system [PDF]
APL PhotonicsWe report the experimental generation of optical skyrmions in the terahertz (THz) region. Using a frequency-tunable two-path interference system, we generated skyrmions at 3–4 THz by superposing a Gaussian beam and an optical vortex with orthogonal ...
Shusaku Mikami +7 more
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Conserved binding mode but diverse interfaces of MreC‐PBP2 interactions
FEBS Letters, EarlyView.The crystal structure of abMreC reveals a conserved two β‐barrel architecture and provides structural insights into its role within the bacterial elongasome. The abMreC–abPBP2 complex model identifies the molecular basis of MreC‐mediated PBP2 recognition, contributing to the regulation of peptidoglycan synthesis.
Hyunseok Jang +4 more
wiley +1 more source
The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation
FEBS Letters, EarlyView.Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge +6 more
wiley +1 more source
Longitudinal Component Properties of Circularly Polarized Terahertz Vortex Beams
Frontiers in Physics, 2021 A circularly polarized vortex beam possesses similar focusing properties as a radially polarized beam. This type of beam is highly valuable for developing optical manufacturing technology, microscopy, and particle manipulation.
Miao Wang +6 more
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