Free opening and closing system for local hollow beam based on optical tweezer technology

A local hollow beam and optical tweezers technology, applied in the field of applied optics, can solve problems such as complex structure, low flexibility, and high cost, and achieve the effects of high flexibility, improved capture efficiency, and low cost

Active Publication Date: 2020-04-07
CHANGCHUN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, there are few reports on the generation of localized hollow beams with gaps, mainly focusing on the polarization control of biaxial crystals and the control of spatial light modulators. question

Method used

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  • Free opening and closing system for local hollow beam based on optical tweezer technology
  • Free opening and closing system for local hollow beam based on optical tweezer technology
  • Free opening and closing system for local hollow beam based on optical tweezer technology

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Embodiment Construction

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is some embodiments of the present invention, but not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0022] In addition, the terms "first" and "second" are used for descriptive pur...

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Abstract

The invention relates to a free opening and closing system for a local hollow light beam based on an optical tweezer technology. The free opening and closing system comprises a laser source, a beam expander, a circular hole diaphragm, an axicon and a focusing lens which are sequentially arranged in the light propagation direction. Laser emitted by the laser source passes through the beam expander;the asymmetric light beam after regulation and control is refracted by the axicon and is focused by the focusing lens to form a local area hollow light beam with a notch, the rotating circular hole diaphragm is recovered, and the incident light beam passes through the optical system to form a three-dimensional closed local area hollow light beam. By flexibly rotating the circular hole diaphragm and regulating and controlling the incident light beam, the formed local hollow light beam notch can be freely opened and closed, a new thought is provided for particle capture of an optical tweezer system, the limitation of an existing optical tweezer device is solved, and the characteristics that the system is easy to operate, tunable and stable can be achieved.

Description

technical field [0001] The invention relates to the field of applied optics technology, in particular to a free opening and closing system of local hollow beams based on optical tweezers technology. Background technique [0002] Among the hollow beams, there is a special type that has attracted widespread attention. In the direction of propagation, there is a three-dimensional closed area with minimal or even zero light intensity, like a special airtight container, called local hollow beams. Localized hollow beams have many novel and unique properties, such as barrel-shaped intensity distribution, spin angular momentum and orbital angular momentum, small dark spot size, and no heating effect. These characteristics make hollow beams have unique applications in laser trapping and cooling, optical tweezers, Bose-Einstein condensate, optical measurement, computational holography, etc. Among them, the optical tweezers technology based on the laser microbeam optical trap effect i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/09G21K1/00
CPCG02B27/095G02B27/0955G02B27/0988G21K1/00
Inventor 张贺林兴磊金亮徐英添邹永刚李卫沿王海珠范杰马晓辉
Owner CHANGCHUN UNIV OF SCI & TECH
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