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Mode-controllable vector vortex light beam generation device and mode-controllable vector vortex light beam generation method

A vortex beam and generating device technology, which is applied to the structural form of radiation elements, electromagnetic transceivers, waveguide-type devices, etc., can solve problems such as inability to accurately generate vector vortex beams of different modes, and achieve low cost and simple adjustment methods. , easy to achieve effect

Active Publication Date: 2019-12-31
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above analysis, the embodiment of the present invention aims to provide a mode-controllable vector vortex beam generating device and method to solve the problem that the prior art cannot accurately generate vector vortex beams of different modes

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  • Mode-controllable vector vortex light beam generation device and mode-controllable vector vortex light beam generation method
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  • Mode-controllable vector vortex light beam generation device and mode-controllable vector vortex light beam generation method

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Embodiment 1

[0068] A specific embodiment of the present invention discloses a mode controllable vector vortex beam generation device, such as figure 1 As shown, it includes an electromagnetic wave transmitting device, an electromagnetic wave receiving device, a controller, an adjustable Archimedes spiral metal particle, an artificial surface plasmon waveguide, and a dielectric substrate. In the figure, the electromagnetic wave transmitting device, the electromagnetic wave receiving device, and the controller perform omitted.

[0069] Among them, the artificial surface plasmon waveguide is set above the dielectric substrate, its input end is connected to the electromagnetic wave transmitting device, and its output end is connected to the electromagnetic wave receiving device; the adjustable Archimedes spiral metal particles are symmetrically arranged on the artificial surface plasmon waveguide. Both sides of the element waveguide. The Archimedes spiral metal particle is an Archimedes spir...

Embodiment 2

[0076] Based on the optimization in Example 1, the adjustable Archimedes spiral metal particle and the artificial surface plasmon waveguide use the same material. The material includes at least one of copper, aluminum, silver, and gold.

[0077] Preferably, the artificial surface plasmon waveguide adopts an H-shaped metal periodic groove structure.

[0078] Preferably, the thickness of each adjustable Archimedes spiral metal particle, the width of the Archimedes metal spiral arm is fixed, its radius, the number of Archimedes metal spiral arms, and the position are all adjustable, with M pieces of Archimedes Tunable Archimedes spiral metal grains for De metal spiral arms, such as figure 1 shown. Two Archimedean spiral metal particles with the same size and structure are used as a group, arranged as a dipole structure, and arranged above the artificial surface plasmon waveguide at a position equal to the distance from the artificial surface plasmon waveguide.

[0079] Prefera...

Embodiment 3

[0089] The present invention also provides a method for generating a vector vortex beam using the vector vortex beam generating device described in Embodiment 1 or 2, comprising the following steps:

[0090] S1. Arranging a vector vortex beam generating device at a preset position to feed power to the surface of the artificial surface plasmon waveguide.

[0091] S2. Determine the standard radius of each Archimedes spiral metal particle and the number of standard Archimedes metal spiral arms according to the size of the topological charge to be adjusted and the working wavelength, and automatically adjust the two Archimedes spiral metal particles to The standard radius and number of standard Archimedean metal arms. Optionally, the metal particle structure can be obtained by CST simulation software.

[0092] S3. According to the size of the topological charge to be adjusted, the above-mentioned standard radius and the number of standard Archimedes metal spiral arms, further det...

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Abstract

The invention relates to a mode-controllable vector vortex light beam generation device and a mode-controllable vector vortex light beam generation method, belongs to the technical field of vortex light beam generation and solves a problem that vector vortex light beams in different modes cannot be accurately generated in the prior art. The device comprises an electromagnetic wave transmitting device, an electromagnetic wave receiving device, a controller, adjustable Archimedes spiral metal particles, an artificial surface plasmon waveguide and a dielectric substrate, wherein the artificial surface plasmon waveguide is arranged above the dielectric substrate, an input end of the artificial surface plasmon waveguide is connected with an output end of the electromagnetic wave transmitting device, and the output end is connected with an input end of the electromagnetic wave receiving device, the controller is used for adjusting the shape and the position of the Archimedes spiral metal particles, and the adjustable Archimedes spiral metal particles are symmetrically arranged on two sides of the artificial surface plasmon waveguide. The device is advantaged in that the vector vortex light beams with the topological charge to be debugged can be generated, and the device is simple, easy to implement and low in cost and has outstanding technical advantages.

Description

technical field [0001] The invention relates to the technical field of vortex beam generation, in particular to a mode-controllable vector vortex beam generation device and generation method. Background technique [0002] Vector vortex beams carry certain energy and optical angular momentum. Wherein, optical angular momentum includes spin angular momentum (SAM) and orbital angular momentum (OAM). SAM is related to the electric field polarization direction of the electromagnetic wave and depends on the polarization state of the incident light; OAM is the rotation of the electromagnetic wave around the axis, with a certain helical phase plane and azimuth component. [0003] In the vector vortex beam, OAM is caused by adding a phase factor to the normal electromagnetic wave, so that the wavefront of the electromagnetic wave is no longer in the form of a plane, but rotates around the beam propagation direction, showing a spiral phase distribution structure. Its electric field ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01P3/08H01Q1/38H01Q1/50H04B10/40
CPCH01P3/08H01Q1/38H01Q1/50H04B10/40
Inventor 沈晓鹏叶红梅王伟华韩奎李海鹏赵雷
Owner CHINA UNIV OF MINING & TECH
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