Results 31 to 40 of about 2,883 (253)

Generation of terahertz vector beams using dielectric metasurfaces via spin-decoupled phase control

Nanophotonics, 2020
Cylindrical vector beams (CVBs), being a special kind of beams with spatially variant states of polarizations, are promising in photonics applications, including high-resolution imaging, plasmon excitation, optical trapping, and laser machining. Recently,
Xu Yuehong, Zhang Huifang, Li Quan, Zhang Xueqian, Xu Quan, Zhang Wentao, Hu Cong, Zhang Xixiang, Han Jiaguang, Zhang Weili   +9 more
doaj   +1 more source

Metasurface-generating high purity narrow linewidth cylindrical vector beams: power scaling and its limitation

Frontiers in Physics, 2023
1.89 kW cylindrical vector beams (CVBs) at 1,064 nm with the 3 dB linewidth being about 0.08 nm have been generated from a narrow linewidth all-fiber linearly-polarized laser by metasurface extra-cavity conversion.
Haokun Li, Haokun Li, Lianghua Xie, Chun Zhang, Rumao Tao, Qiang Shu, Min Li, Benjian Shen, Xi Feng, Lixin Xu, Jianjun Wang   +10 more
doaj   +1 more source

Experimental Generation of Structured Light Beams through Highly Anisotropic Scattering Media with an Intensity Transmission Matrix Measurement

Photonics, 2023
Structured light beams have played important roles in the fields of optical imaging and optical manipulation. However, light fields scatter when they encounter highly anisotropic scattering media, such as biological tissue, which destroys their original ...
Qiannan Lei, Haokai Gong, Shijie Tu, Yangjian Cai, Qian Zhao   +4 more
doaj   +1 more source

Optical trapping and optical binding using cylindrical vector beams

Atti della Accademia Peloritana dei Pericolanti : Classe di Scienze Fisiche, Matematiche e Naturali, 2011
We report on the use of cylindrical vector beams for optical manipulation of micron and sub-micron sized particles using the methods of a single-beam gradient force trap (optical tweezers) and an evanescent-field surface trap (optical binding).
S. E. Skelton, M. Sergides, R. Patel, E. Karczewska, O. M. Marago', P. H. Jones   +5 more
doaj   +1 more source

Polarization converter for higher-order laser beams based on the use of forming binary diffractive optical elements as beam splitter

Vestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2012
We propose a new approach to generating a pair of initial beams for a polarization converter that operates by summing up two opposite-sign circularly polarized beams.
S. V. Karpeev, S. N. Khonina, O. Yu. Moiseev, S. V. Alferov, A. V. Volkov   +4 more
doaj   +3 more sources

Dynamic control of cylindrical vector beams via anisotropy

Optics Express, 2018
We demonstrate that the spatially diffractive properties of cylindrical vector beams could be controlled via linear interactions with anisotropic crystals. It is the first time to show experimentally that the diffraction of the vector beams can be either suppressed or enhanced significantly during propagation, depending on the sign of anisotropy ...
Chaoheng, Guo, Shenhe, Fu, Haolin, Lin, Zhen, Li, Hao, Yin, Zhenqiang, Chen   +5 more
openaire   +2 more sources

Reverse energy flow in vector modes of optical fibers

Компьютерная оптика, 2023
In this paper, the propagation of a second-order cylindrical vector beam in gradient-index and microstructured fibers is numerically simulated using the RSoft Fullwave software.
S.S. Stafeev, A.D. Pryamikov, G.K. Alagashev, V.V. Kotlyar   +3 more
doaj   +1 more source

NanoMOF‐Based Multilevel Anti‐Counterfeiting by a Combination of Visible and Invisible Photoluminescence and Conductivity

Advanced Functional Materials, EarlyView.
This study presents novel anti‐counterfeiting tags with multilevel security features that utilize additional disguise features. They combine luminescent nanosized Ln‐MOFs with conductive polymers to multifunctional mixed‐matrix membranes and powder composites. The materials exhibit visible/NIR emission and matrix‐based conductivity even as black bodies.
Moritz Maxeiner, Ruben Maile, Murat Cuvalli, Andreas Wolf, Ayisha Komal, Robert Oestreich, Christoph Janiak, Karl Mandel, Alexander Knebel, Klaus Müller‐Buschbaum   +9 more
wiley   +1 more source

Optical Communication Performance of Cylindrical Vector Partially Coherent Laguerre–Gaussian Beams in Atmospheric Turbulence

Photonics
The optical communication performance of cylindrical vector partially coherent Laguerre–Gaussian (PCLG) beams in different atmospheric turbulence models are investigated.
Meng Liu, Linxuan Yao, Yaru Gao, Hui Zhang, Yangsheng Yuan, Bohan Guo, Huimin Shi   +6 more
doaj   +1 more source

Encoding Magnetic Anisotropies in Digital Light Processing 3D Printing

Advanced Functional Materials, EarlyView.
A hybrid magnetic device—combining a coaxial coil within a nested Halbach array—is presented, integrated into a DLP 3D printer to enable spatially resolved magnetic field control. This system enables complex, multimodal responses by programming liquid crystal elastomer resins for magnetic and thermal actuation, and by inducing electrically conductive ...
Eléonore Aïdonidis, Andrea Cosola, Pierre Bourdon, Hichem Dammak, Marco Sangermano, Frédéric Demoly, Marco Faustini, Amélie Pérot, Didier Lairez, Rakine Mouhoubi, Sébastien Blanquer, Giancarlo Rizza   +11 more
wiley   +1 more source