检索结果-南通市图书馆

Additive Manufacturing of Metal Micro-ring and Tube by Laser-Assisted Electrophoretic Deposition with laguerre-gaussian beam

在线全文

学校读者我要写书评

暂无评论

Nanomanufacturing and Metrology 2021年第4期4卷 271-277页

作者： Kenta Nakazawa Syunya Ozawa Futoshi Iwata Graduate School of Integrated Science and Technology Shizuoka University3-5-1 Johoku.Naka-kuHamamatsu 432-8561.Japan Graduate School of Medical Photonics Shizuoka University3-5-1 JohokuNaka-kuHamamatsu 432-8011Japan Research Institute of Electronics Shizuoka University3-5-1 JohokuNaka-kuHamamatsu 432-8011Japan

We report a method for laser-assisted electrophoretic deposition using a laguerre-gaussian beam for maskless patterning of metal rings and *** are structures of utmost importance,particularly in photonic *** nanoparticles,which are gathered in a colloidal solution by a laser trapping technique,are deposited on a substrate via *** deposition pattern is dependent on the focused spot shape during laser *** intensity distribution of the laguerre-gaussian beam is *** with different inner diameters can be fabricated by varying the topological charge of the laguerre-gaussian *** equivalent inner diameters of the deposited rings with topological charges of 1,3,and 5 were 0.30,0.78,and 1.45μm,*** inner diameter of the deposited ring with a topological charge of 1 was smaller than the wavelength of the laser beam(532 nm).A tube was also fabricated with a topological charge of 3 by vertical displacement of the deposition *** deposition technology developed here using laguerre-gaussian beam will contribute to advancements in the fabrication of photonic and nano-fluidic devices.

关键词： Additive manufacturing laguerre-gaussian beam Laser trapping Maskless fabrication Electrophoretic deposition

Composite optical vortices in noncollinear laguerre–gaussian beams and their propagation in free space

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2008年第5期17卷 1743-1751页

作者：程科刘普生吕百达 Institute of Laser Physics and Chemistry Sichuan University

Taking two laguerre-gaussian beams with topological charge 1 = ±1 as an example, this paper studies the composite optical vortices formed by two noncollinear laguerre-gaussian beams with different phases, amplitudes, waist widths, off-axis distances, and their propagation in free space. It is shown by detailed numerical illustrative examples that the number and location of composite vortices at the waist plane are variable by varying the relative phase β, amplitude ratio η, waist width ratio ξ, or off-axis distance ratio μ. The net topological charge lnet is not always equal to the sum lsum of charges of the two component beams. The motion, creation and annihilation of composite vortices take place in the free-space propagation, and the net charge during the propagation remains unchanged and equals to the net charge at the waist plane.

关键词： composite optical vortex laguerre-gaussian beam topological charge creation and annihilation

Average Capacity of OAM-Multiplexed FSO System with Vortex beam Propagating Through Non-Kolmogorov Turbulence

在线全文

学校读者我要写书评

暂无评论

China Communications 2016年第10期13卷 153-159页

作者： Hua Tang Wei Xu Guohua Wu School of Electronics and Information Engineering Beihang University Schoolof Electronic Engineering Beijing University of Posts and Telecommunications

The propagation of vortex beam in atmospheric turbulence is of significant importance in theoretical study and practical applications. Based on extended Huygens-Fresnel integral and the Rytov approximation, the average capacity of orbital angular momentum(OAM)-multiplexed laguerre-gaussian(LG) beam propagating through non-Kolmogorov turbulence is presented, and the analytical expression of spiral spectrum of LG beam has been deduced. The average capacity of FSO system is numerically calculated and the influence of exponent parameter, transmission height, structure constant, wavelength, outer scale and inner scale on average capacity are also analyzed in detail. Outcomes show that smaller structure constant, outer scale, higher transmission height and larger wavelength, inner scale are conducive to improve average capacity in different extent. Results acquires in this paper have potential application value in optical communication within non-Kolmogorov turbulence.

关键词： laguerre-gaussian beam non-kolmogorov turbulence multiple topological charges average capacity

Approximate analytical expressions of apertured broadband beams in the far field

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2011年第3期20卷 221-226页

作者：陆世专游开明陈列尊王友文 National Laboratory of Solid State Microstructures and Department of Physics Nanjing University Department of Physics and Electronic Information Science Hengyang Normal University

The approximate analytical expressions of the apertured broadband beams in the far field with gaussian and laguerre-gaussian spatial modes are presented. For the radially polarized laguerre-gaussian beam, the result reveals that the electromagnetic field in the far field is transverse magnetic. The influences of bandwidth （Г） and truncation parameter （Co） on the transverse intensity distribution of the gaussian beam and on the energy flux distribution of radially polarized laguerre-gaussian beam are analysed.

关键词： broadband beams laguerre-gaussian beam apertured