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Macroscopic laser traction method in rarefied gas, macroscopic laser traction device and application

A thin gas and laser technology, applied in the laser field, can solve the problems of target material consumption, technical difficulties, strict requirements on beam quality and energy distribution, etc., and achieve the effect of overcoming micro-scale limitations, broad application prospects, and simple and efficient process

Pending Publication Date: 2022-04-12
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The optical tweezers technology based on photon momentum transfer can realize the movement and traction manipulation of nanoparticles and micro-cells, and the special Bessel beam can realize the traction motion of micro-nano scale objects, but neither of them can achieve macroscopic optical traction
Radiation pressure-based light sails enable macroscopic light propulsion, but not beam traction
Laser ablation-induced high-pressure plasma can achieve light propulsion, but it cannot achieve light traction, and it needs to consume target materials
[0004] Through the above analysis, the existing problems and defects of the existing technology are as follows: (1) The existing laser traction technology is only applicable to nano- or micro-scale objects, and cannot achieve laser traction on macro-scale objects
(2) The laser traction process in the prior art is cumbersome and has strict requirements on beam quality and energy distribution
[0005] The difficulty in solving the above problems and defects is: the existing laser traction technology is applicable to micro-nano-scale objects in principle, and it is difficult to realize laser traction at the macro-scale. This is not only a technical difficulty, but also has a large number of unsolved scientific problems

Method used

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  • Macroscopic laser traction method in rarefied gas, macroscopic laser traction device and application
  • Macroscopic laser traction method in rarefied gas, macroscopic laser traction device and application
  • Macroscopic laser traction method in rarefied gas, macroscopic laser traction device and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] This example demonstrates laser pulling under different laser wavelengths, and the specific process includes:

[0071] (1) if Figure 2A As shown in -C, the graphene airgel / glass bilayer and PET plastic sheet (about 5 cm in length) were fixed together according to the classic torsion model in physics, and hung on a metal support. Here, the PET plastic sheet can also be replaced by other loads.

[0072] (2) if Figure 2D As shown, the above torsion device was put into a transparent vacuum chamber filled with air. Use an air pump to evacuate the air pressure in the vacuum chamber to 6Pa to create a thin gas environment.

[0073] (3) if Figure 3A-Figure 3C As shown, the laser beam with a wavelength of 532nm is irradiated from right to left on the glass surface of the graphene airgel / glass bilayer, the spot diameter is in millimeter order, and the power is 60mW. Within 1.48s, an obvious macroscale laser pulling phenomenon can be observed.

[0074] (4) if Figure 3D-...

Embodiment 2

[0076] This example demonstrates laser pulling at different laser powers.

[0077] (1) Repeat steps 1 and 2 in Example 1.

[0078] (2) if Figure 4A-Figure 4F As shown, increasing the power of the laser beam from 17mW to 85mW, the deflection angle of the torsion increases gradually, indicating that increasing the laser power can improve the laser traction force.

[0079] From Examples 1 and 2, it can be seen that using the graphene airgel / glass double-layer structure can realize laser traction on a macro scale. This laser traction requires no contact and does not require any fuel. Also, other payloads can be added on top of the two-layer structure described above. Laser traction can be effectively regulated by laser power. The method is simple, efficient, green and environmentally friendly, and has broad application prospects in the field of macroscopic light beam manipulation.

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Abstract

The invention belongs to the technical field of laser, and discloses a macroscopic laser traction method in rarefied gas, a macroscopic laser traction device and application. Placing the macroscopic-scale graphene aerogel / silicon dioxide double layer in a rarefied gas; irradiating the silicon dioxide layer by using a laser beam; the graphene aerogel / silicon dioxide double-layer material and a related object are subjected to macro-scale laser traction in rarefied gas. Compared with the prior art, the micro-scale limitation of an existing light traction technology on a towed object is overcome, macro-scale laser traction can be achieved, non-contact traction of a graphene aerogel / silicon dioxide double-layer or other related objects can be achieved without any fuel, the traction force is far larger than light pressure (radiation pressure), and the traction force is high. The whole process is simple, efficient, environment-friendly and wide in application prospect.

Description

technical field [0001] The invention belongs to the field of laser technology, and in particular relates to a macroscopic laser traction method in rare gas, a macroscopic laser traction device and its application. Background technique [0002] Around 2010, the subversive concept of "light traction" was first proposed, that is, a light beam exerts a pulling force on an object, which is just the opposite of light propulsion. As a new light manipulation method, optical traction has great application potential in opto-mechanical systems, military investigation, space flight and other fields, and is currently a research hotspot in laser technology. [0003] So far, there are few means to achieve light traction. The optical tweezers technology based on photon momentum transfer can realize the movement and traction manipulation of nanoparticles and micron cells, and the special Bessel beam can realize the traction motion of micro-nano scale objects, but neither of them can achieve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21K1/00
Inventor 王雷
Owner QINGDAO UNIV OF SCI & TECH