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Design method of vortex array mask plate in abnormal annular connection

A technology of ring connection and mask plate, which is applied in the direction of optical components, optics, instruments, etc., can solve problems such as lack and achieve the effect of important application prospects

Active Publication Date: 2020-07-31
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] To sum up, in the field of particle manipulation, there is still a lack of an anomalous ring-connected vortex array beam with controllable local vortex distribution on the halo and a constant total number of vortices that can be used for particle manipulation. field, especially the need for simultaneous capture of particles of different sizes

Method used

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  • Design method of vortex array mask plate in abnormal annular connection
  • Design method of vortex array mask plate in abnormal annular connection
  • Design method of vortex array mask plate in abnormal annular connection

Examples

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Embodiment

[0031] Taking a mask with a size of 512×512 as an example, an abnormal ring-connected vortex array with controllable local vortex distribution and a constant total number of vortices on the halo is given for a laser with a working wavelength of 532 nm. The cone angle factor of the mask template axicon lens is respectively taken as α a = 0.07rad and α b =0.08rad, the local topological charge parameters of the reconstructed helical phase factor are chosen as m a1 Take 1 as the interval from 4 to 1, m a2 Take 1 as the interval from 4 to 7, m b1 =m b2 =-4, according to the transmittance function of the mask in the specific embodiment, an abnormal ring-connected vortex array mask with controllable local vortex distribution on the halo and a constant total number of vortices is finally obtained. figure 1 The masks generated under the different values ​​of local topological charge parameters are given. The anomalous ring-connected vortex array mask with controllable local vortex d...

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Abstract

The invention discloses a design method of a vortex array mask plate in abnormal annular connection. Two reconstructed spiral phase factors and two conical lens complex transmittance functions are combined, and a complex transmittance function of the vortex array mask plate in abnormal annular connection is obtained; the complex amplitude transmittance function is loaded into a spatial light modulator through a computer to generate the vortex array mask plate in abnormal annular connection, the vortex array mask plate in abnormal annular connection is controllable in local vortex distributionon a required light ring and the total number of vortexes is kept unchanged. The mask plate is used for generating an abnormal annular connected vortex array with controllable vortex distribution andunchanged total vortex number on the light ring, so as to meet the requirement of simultaneous capture of particles with different sizes in the field of particle manipulation.

Description

technical field [0001] The invention relates to the field of particle manipulation, in particular to a design method of an abnormal ring-connected vortex array mask. Background technique [0002] Because the optical vortex carries orbital angular momentum, it has a wide range of applications in particle trapping and optical tweezers. Therefore, it has become an important research hotspot in the field of optics and has attracted extensive attention of researchers. The vortex array, because it carries multiple vortices, provides an additional control degree of freedom, and has become an important research hotspot in the application of multi-particle capture in the field of micromanipulation. In these applications, the vortex distribution of the vortex array has important research significance. [0003] The vortex array beams connected by light intensity are generally produced by the coaxial superposition of two or more spatially structured beams. In 2007, S.Franke-Arnold et...

Claims

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Application Information

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IPC IPC(8): G02B27/00G02B27/09
CPCG02B27/0012G02B27/0988
Inventor 李新忠张浩李懋王亚坤朱刘昊
Owner HENAN UNIV OF SCI & TECH
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