Adjustable optical tweezers device

Abstract

The invention relates to an adjustable optical tweezers device, comprising the following parts: a light source module, used for collimating a parallel laser beam; a vortex phase control module, wherein the optical input end is connected with the light source module for changing the central singular spatial position of a vortex phase of the collimated parallel laser beam; a high numerical aperturefocusing optics module, wherein the optical input end is connected to the optical output end of the vortex phase control module for focusing polarized laser; and a sample stage, located at the opticaloutput end of the high numerical aperture focusing optical module for fixing and moving the sample. Compared with the prior art, the adjustable optical tweezers device is simple in optical path structure and continuously adjustable in diaphragm operation, is suitable for medium particles with high and low refractive indexes, and has a great application prospect in the manipulation of small particles.

Description

technical field [0001] The invention relates to an optical tweezers technology, in particular to an adjustable optical tweezers device. Background technique [0002] Since Ashkin used the radiation pressure of visible lasers to accelerate and trap micron-scale particles in 1986, people's research on how to use lasers to actively manipulate tiny particles or biological cells has continued to develop, that is, optical tweezers technology, which has been used for physics, biology and chemistry. The field has brought many innovations. For example, the study of Brownian motion, the observation of colloidal aggregation process and the sorting of chromosomes, etc. As a typical example of the photomechanical effect, optical tweezers technology is a manifestation of the interaction between light and matter. Therefore, from the perspective of light, optical tweezers must depend on the size and spatial distribution of physical parameters such as energy and momentum inherent in the li...

AI Technical Summary

Problems solved by technology

However, at present, many optical tweezers technologies are based on single or multiple identical optical tweezers optical fields for particle manipulation, resulting in a relatively single mode of optical tweezers operation, and often can only manipulate small particles of one type of refractive index medium.

Although the combination of optical holography technology can enrich the light field of optical tweezers, it often requires efficient and complex algorithms to control

Images