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Device for realizing particle light leakage switching by using associated vortex array

A vortex beam, particle technology, applied in the direction of instruments, etc., to achieve the effect of less optical components and simple optical path

Pending Publication Date: 2020-04-10
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the manipulation of turning and moving up and down of particles by utilizing correlated vortex beams is an unrealized problem so far.

Method used

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  • Device for realizing particle light leakage switching by using associated vortex array
  • Device for realizing particle light leakage switching by using associated vortex array
  • Device for realizing particle light leakage switching by using associated vortex array

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Embodiment Construction

[0023] Below in conjunction with embodiment the present invention is described in further detail, following embodiment is explanation to the present invention, also is the preferred application form of the present invention, but the present invention is not limited to following embodiment.

[0024] like figure 1 As shown, it is a schematic diagram of the structure of a microparticle light leakage switch device realized by using an associated vortex array in this embodiment: it includes a laser 1; a beam expander 2; a spatial light modulator 3; a computer 4; 5; 10x objective lens 6.

[0025] In this embodiment, the light field used to generate the associated vortex array:

[0026]

[0027] Indicates that the light field generated by the kth hologram is formed by a radial array composed of N sub-light sources in M ​​coherent superposition fields, where N=5; δ p Indicates random phase, ranging from 0 to 2π; represents the light field of the jth sub-light source, is the i...

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Abstract

The invention discloses a device for controlling a particle light leakage switch by using an associated vortex array. The method comprises the following implementation steps: preparing a group of hologram sequences by using a computer, loading the hologram sequences to a spatial light modulator, and repeatedly playing in a dynamic frame form; irradiating the spatial light modulator by using laser,and enabling a light beam to be vertically upward through reflection, that is, opposite to the direction of a gravity field; selecting first-order diffracted light of the reflected light beam and irradiating the first-order diffracted light into a 10x objective lens for focusing to form a light trap; putting the particles into an optical trap, wherein the state of the particles is determined by the phase and coherence degree of an associated vortex light beam generated by modulation of a spatial light modulator. Different hologram sequences are prepared by changing parameters and loaded to the spatial light modulator to be played in the form of a dynamic frame, so that control over up-down movement and rotation of particles is achieved. The device provided by the invention uses a small number of optical devices, is simple in layout, and belongs to the field of optical manipulation.

Description

technical field [0001] The invention provides a device for realizing particle photoleakage switch by using correlative vortex array. The associated vortex generated by the device is adjustable, which can realize the up and down movement and rotation of particles, and belongs to the field of optical particle manipulation. Background technique [0002] The photons in the vortex beam can carry both orbital angular momentum (related to the vortex phase) and spin angular momentum (related to the polarization state), and the optical trap formed by focusing can exchange momentum and angular momentum with particles. Exchange is one of the most potential means of manipulating the translation and rotation of particles. In recent years, real-time dynamic manipulation of particles using vortex light has attracted more and more attention. [0003] A coherent vortex is a special kind of optical vortex with a helical phase structure in the two-point cross spectral density function. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/00G03H1/12
CPCG03H1/0005G03H1/12G03H2001/0077G03H2001/0088
Inventor 陈君张莹莹
Owner CHINA JILIANG UNIV
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