Fiber optical tweezers based on cholesteric liquid crystal filling

Abstract

Provided are fiber optical tweezers based on cholesteryl phase liquid crystal filling, characterized in that the fiber optical tweezers are composed of a hollow core optical fiber filled with cholesteryl phase liquid crystal; the hollow core optical fiber is internally provided with 2n fiber core holes, wherin n is a natural number greater than or equal to 2; on the cross section of the hollow core optical fiber, the distance between each fiber core hole and the axis of the hollow core optical fiber is the same; the plurality of fiber core holes are circumferentially and uniformly distributed along the hollow core optical fiber; and each fiber core hole is filled with cholesteryl phase liquid crystal, the screw symmetry axis of the cholesteryl phase liquid crystal is axially parallel with the hollow core optical fiber , and the hollow core optical fiber filled with cholesteryl phase liquid crystal forms fiber optical tweezers. The invention provides new fiber optical tweezers which have a simple structure, and allow minimal particles to move only through adjusting luminous intensity without moving the fiber optical tweezers.

Description

technical field [0001] The invention relates to an optical tweezers, in particular to an optical fiber optical tweezers filled with cholesteric liquid crystals. Background technique [0002] Optical tweezers is a device that can capture tiny particles, and it has a wide range of applications at present; in the prior art, there are generally two methods for forming optical tweezers: one is to generate a laser beam through a laser, and then expand the beam The laser beam is processed by a device and a light intensity regulator, and the processed beam is introduced into the microscope system, and the microparticles are captured through the optical trap formed by the beam. The hardware system of this kind of optical tweezers is large in size, which is not conducive to miniaturization; One is fiber optic tweezers, which use the laser beam emitted from the fiber to control particles. The fiber optic tweezers are small in size and can be independent of the microscope system, so the...

AI Technical Summary

Problems solved by technology

[0002] Optical tweezers is a device that can capture tiny particles, and it has a wide range of applications at present; in the prior art, there are generally two methods for forming optical tweezers: one is to generate a laser beam through a laser, and then expand the beam The laser beam is processed by a device and a light intensity regulator, and the processed beam is introduced into the microscope system, and the microparticles are captured through the optical trap formed by the beam. The hardware system of this kind of optical tweezers is large in size, which is not conducive to miniaturization; One is fiber optic tweezers, which use the laser beam emitted from the fiber to control particles. The fiber optic tweezers are small in size and can be independent of the microscope system, so they have great application prospects. Although fiber optic tweezers have obvious advantages, they also have some defects. : The particles captured by the optical fiber tweezers can only stay still in the light field, or guide the particles to perform simple one-dimensional linear motion through the forward or backward movement of the optical fiber optical tweezers as a whole; in engineering applications, it is often necessary for the particles to change the angle , when using the existing optical fiber tweezers to achieve angle adjustment, it is necessary to add multiple groups of optical fiber tweezers to control the particles at different angles and adjust the angle of the particles. This angle adjustment method is still the same as the discrete lens optical tweezers. Integrated combined operation, complex system, and very inconvenient for continuous adjustment operation

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