Novel cone lens for generating Bottle beams with periodicity

Abstract

The invention discloses a novel cone lens for generating Bottle beams with the periodicity, which consists of an axis pyramid and a frustum structure glued at the bottom of the axis pyramid; the lower bottom surface of the frustum structure is glued with the bottom surface of the axis pyramid; and the radius of the lower bottom surface of the frustum structure is larger than that of the upper bottom surface of the frustum structure. The novel cone lens can obtain a plurality of Bottle beams with the recurrence periodicity through a single component and adjust the dimension and the recurrence periods of the plurality of generated Bottle beams through controlling a bottom angle of the frustum structure and the radius of the upper bottom. Compared with the conventional method for generating the bottle beams, the novel cone lens has the advantages of simple structure, high conversion efficiency and high light damage threshold value, and the component is simple to process. The novel cone lens provides a brief and effective new approach for obtaining the Bottle beams and has the special significance for the multi-layer operation and control of particles.

Description

technical field [0001] The invention relates to a novel axicon lens capable of generating periodic local hollow beams (Bottle beam), which can realize single-level and multi-level control of particles, and has special significance for particle control. Background technique [0002] The local hollow beam (Bottle beam) is a beam with zero intensity along the propagation direction of the beam, and a beam of high-intensity light in three-dimensional space outside this area, because of its special light field distribution and optical tweezers , Optical micromanipulation and other important applications have aroused great interest. [0003] At present, there are many methods to generate bottle beam: such as optical holography, Bessel optical coherence method, Gaussian beam and Laguerre-Gaussian beam interference method, axicon-lens method, etc. However, these methods require more than one optical element, and are expensive, not only have the problem of high equipment cost, but al...

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Problems solved by technology

However, these methods require more than one optical element, and are expensive, not only have the problem of high equipment cost, but also have the defect that the system installation and debugging are difficult, which is not conducive to the practical application of bottle beam

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