Results 31 to 40 of about 1,891,930 (242)

Optimal E-Field Vector Combination for a Highly Focused Antenna-Array [PDF]

, 2014
A near-field highly focused circular phased-array antenna for 5.8-GHz radio frequency identification (RFID) applications is presented. The electric field (E-field) at the focus is enhanced by a constructive vector combination in a three-dimensional (3-D)
Perallos, Asier, Martinez, R, Sharma, A, Batchelor, John C., Garcia Zuazola, Ignacio Julio, de-Haro Ariet, L   +5 more
core   +1 more source

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

APL 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, Yujie Miao, Hao Fu, Hongsen He, Jia Tong, Jun Dong   +5 more
doaj   +1 more source

Effect of the azimuthal gradient of the thermal load on the depolarization of cylindrical vector beams propagating in a side non-uniformly pumped isotropic medium

Results in Physics, 2019
The theoretical and experimental investigations of the depolarization of cylindrical vector beams when they propagate into a side non-uniformly pumped isotropic laser medium.
Ce Yang, Hong-Pan Peng, Meng Chen, Shang Lu, Ning Ma   +4 more
doaj   +1 more source

A High-Precision Multi-Beam Optical Measurement Method for Cylindrical Surface Profile

Micromachines, 2023
To automatically measure the surface profile of a cylindrical workpiece, a high-precision multi-beam optical method is proposed in this paper. First, some successive images for the cylindrical workpiece’s surface are acquired by a multi-beam angle sensor
Yinghong Zhou, Zhiliang Wu, Nian Cai, Daohua Zhan, Shaoqiu Xu, Meiyun Chen, Guang Zhou, Han Wang   +7 more
doaj   +1 more source

Conversion of a conical wave with circular polarization into a vortex cylindrically polarized beam in a metal waveguide [PDF]

Компьютерная оптика, 2018
In this paper, we have developed a mathematical base for describing the propagation of waves in a metal waveguide in a cylindrical coordinate system. The transformation of a conical wave with circular polarization into a cylindrically polarized vortex ...
Sergey Kharitonov, Svetlana Khonina
doaj   +1 more source

Super-resolution optical microscopy using cylindrical vector beams

, 2022
Super-resolution optical microscopy using cylindrical vector ...
Min Liu
core   +1 more source

Generation of cylindrical vector beam from GaAs/InGaAs/GaAs core-multishell nanowire cavity

, 2023
We investigated the beam profiles and polarization states in the low-temperature photoluminescence from vertical GaAs/InGaAs/GaAs core-multishell nanowire (NW) under continuous-wave and pulsed excitations.
Kunimoto, Taiga, Obara, Shizuka, Hara, Shinjiro, Motohisa, Junichi   +3 more
core   +1 more source

Supersonic Flutter of Circular Cylindrical Shells [PDF]

, 1966
Various experimental and theoretical studies on the supersonic flutter of circular cylindrical shells are discussed. Results of experiments in the Mach number range 2.5 - 3.5 are presented.
Olson, Mervyn Daniel
core   +1 more source

Operational results with fast automatic beam-based LHC collimator alignment [PDF]

, 2013
The CERN Large Hadron Collider (LHC) is the largest and highest-energy particle accelerator ever built. It is designed to collide particles at a centre-of-mass energy of 14 TeV to explore the fundamental forces and constituents of matter.
Wollmann, Daniel, Salvachua, Belen, Bruce, Roderick, Valentino, Gianluca, Redaelli, Stefano, Wolfgang Assmann, Ralph, Sammut, Nicholas   +6 more
core   +1 more source

Enhancing the Spin Hall Effect of Cylindrically Polarized Beams

Micromachines
Two linked gear wheels in a micromachine can be simultaneously rotated in opposite directions by using a laser beam that has in its section areas the spin angular momentum (SAM) of the opposite sign.
Alexey A. Kovalev, Anton G. Nalimov, Victor V. Kotlyar   +2 more
doaj   +1 more source