Results 31 to 40 of about 1,171,647 (287)

Vectorial Manipulation of High-Resolution Focusing Optical Field through a Scattering Medium

open access: yesPhotonics, 2022
The manipulation of the polarization states of the light transmitted through a scattering medium has become an emerging field due to the novel fundamental physics interest and potential applications.
Bote Qi   +3 more
doaj   +1 more source

Design of broadband terahertz vector and vortex beams: I. Review of materials and components

open access: yesLight: Advanced Manufacturing, 2022
In this paper, we review the existing approaches for vortex and vector beam shaping and generation in the terahertz frequency range. The particular focus of this review is on the possibility of homogeneous topological charge formation in the ultra-wide ...
Nikolay V. Petrov   +4 more
doaj   +1 more source

Focal shift in vector beams

open access: yesOptics Express, 1999
We examine the three-dimensional intensity distribution of vector Bessel-Gauss beams with general polarization near the focus of a nonaperturing thin lens. Recently reported linearly and azimuthally polarized Bessel-Gauss beams are members of this family.
P, Greene, D, Hall
openaire   +2 more sources

Characterization of vector diffraction-free beams [PDF]

open access: yesOptics Letters, 2011
It is observed that a constant unit vector denoted by $\mathbf I$ is needed to characterize a complete orthonormal set of vector diffraction-free beams. The previously found diffraction-free beams are shown to be included as special cases. The $\mathbf I$-dependence of the longitudinal component of diffraction-free beams is also discussed.
Wang, Ting-Ting   +2 more
openaire   +3 more sources

Basalt FRP Spike Repairing of Wood Beams [PDF]

open access: yes, 2015
This article describes aspects within an experimental program aimed at improving the structural performance of cracked solid fir-wood beams repaired with Basalt Fiber Reinforced Polymer (BFRP) spikes.
Luca Righetti   +5 more
core   +1 more source

Note: Vector reflectometry in a beam waveguide [PDF]

open access: yesReview of Scientific Instruments, 2011
We present a one-port calibration technique for characterization of beam waveguide components with a vector network analyzer. This technique involves using a set of known delays to separate the responses of the instrument and the device under test. We demonstrate this technique by measuring the reflected performance of a millimeter-wave variable-delay ...
J R, Eimer   +3 more
openaire   +2 more sources

High-order cylindrical vector beams with tunable topological charge up to 14 directly generated from a microchip laser with high beam quality and high efficiency

open access: yesAPL Photonics, 2019
Large topological charge optical vortex beams carrying orbital angular momentum have potential applications on optical trapping, optical communication with high capacity, quantum information processing.
Dimeng Chen   +5 more
doaj   +1 more source

Vector Optical Beam with Controllable Variation of Polarization during Propagation in Free Space: A Review

open access: yesApplied Sciences, 2021
The vector optical beam with longitudinally varying polarization during propagation in free space has attracted significant attention in recent years. Compared with traditional vector optical beams with inhomogeneous distribution of polarization in the ...
Wen-Yue Wang   +4 more
doaj   +1 more source

Generation of Perfect Cylindrical Vector Beams With Complete Control Over the Ring Width and Ring Diameter

open access: yesIEEE Photonics Journal, 2018
We propose the generation of high-purity perfect cylindrical vector beams (PCVB) using the Fourier transformation of Bessel–Gauss vector beams.
Prabin Pradhan, Manish Sharma, Bora Ung
doaj   +1 more source

Focusing fractional-order cylindrical vector beams

open access: yesКомпьютерная оптика, 2021
By numerically simulating the sharp focusing of fractional-order vector beams (0≤m≤1, with azimuthal polarization at m=1 and linear polarization at m=0), it is shown that the shape of the intensity distribution in the focal spot changes from elliptical ...
S.S. Stafeev, V.D. Zaitsev
doaj   +1 more source

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