Novel cone lens generating single bottle beam

Abstract

The invention discloses a novel cone lens generating a single bottle beam, which is an axicon, wherein a concave circular truncated cone structure is formed at the bottom of the axicon, and the bottom angle of the circular truncated cone structure is less than that of the axicon. The novel cone lens can acquire the single bottle beam through one element, has the advantages of relatively easy element processing, simple structure, high conversion efficiency and high photo damage threshold, and provides a novel concise and efficient way for acquiring the bottle beam; furthermore, the size of the single bottle beam can be adjusted by adjusting the size of the bottom angle or the inner bottom radius of the circular truncated cone structure. In practical application, the novel cone lens can be used as laser conduits, optical tweezers, optical wrenches and other tools, and can be used for confining microscopic particles, neutral atoms, molecules, biological cells and the like by laser, thus has special significance in life science and nano-technology, in particular single-plane and multi-plane manipulation on microparticles.

Description

technical field [0001] The invention relates to a novel axicon lens capable of producing a single localized hollow beam (Bottle beam), which can be used as a tool for laser catheters, optical tweezers and optical wrench, etc., and can also be used for laser trapping microscopic particles and neutral atoms, molecules, Biological cells, etc., have important applications in life sciences and nanotechnology. Background technique [0002] Local hollow beam (Bottle beam) is a beam with a three-dimensional closed area with extremely low (or even zero) intensity in the direction of beam propagation, and the three-dimensional space outside this area is surrounded by high-intensity light, which has extremely High intensity gradient; these characteristics of bottle beam make it suitable for laser trapping and induction of microscopic particles (such as microparticles, nanoparticles, free electrons and biological cells, etc.), as well as the realization of all-optical cooling and trappe...

AI Technical Summary

Problems solved by technology

[0003] At present, there are many methods to generate bottle beam: such as optical holography, non-diffraction Bessel optical coherence method, axicon-lens method, etc. Among them, the anti-damage threshold of optical holography is relatively low, which limits the intensity of bottle, and Bessel optical coherence Both the axicon-lens method and the axicon-lens method require multiple optical components and precise adjustment of the optical path, which has certain limitations in practical applications.

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