Microscopic particle rotator of bidirectional conical optical fibers

Abstract

The invention provides a microscopic particle rotator of bidirectional conical optical fibers, comprising two conical optical fibers and two-body microscopic particles, wherein the conical optical fibers are formed by fused biconical taper; the two conical optical fibers are arranged horizontally; the conical ends are staggeredly arranged at intervals oppositely; the opposite ends of the two conical optical fibers are connected with an optical source respectively; the two-body microscopic particles comprise a driving layer, a stirring layer ad a connecting post respectively; the driving layeris integrated with the stirring layer into a whole by the connecting post; the two-body microscopic particles are arranged in the gap which is formed by staggering the two conical ends of the two conical optical fibers; the conical optical fibers cause transmission lights in fiber cores to transmit a cladding layer and form an evanescent field on the cladding layer; the generated optical radiation forces act the driving layers of the two-body microscopic particles, so that the driving layers of the two-body microscopic particles rotate to drive the stirring layers of the two-body microscopic particles. The rotator is small in volume, light in weight, simple in structure, low in price, easy to operate, large in operating range and high in stirring efficiency; by using the rotator, the solvent activity can be avoided being damaged due to direct contact; and the rotator can be applied to biology and chemistry microflow systems.

Description

technical field [0001] The invention relates to a tiny particle rotator, in particular to a rotator which utilizes the evanescent field formed by a tapered optical fiber to generate light radiation pressure to drive double-body tiny particles to rotate. Background technique [0002] In recent years, Micro Total Analysis System (μTAS), also known as a laboratory built on a single chip, has set off a huge wave of research in the fields of medical research, biological application analysis and chemistry. Spinners composed of tiny particles play a vital role as agitators in microfluidic systems, so the design and preparation of tiny particle spinners is becoming more and more important. In order to obtain higher performance rotators, people began to use light drives. [0003] In 1936, R.A. Beth experimentally passed a beam of circularly polarized light through a half-wave plate suspended by a filament, and for the first time used the angular momentum of photons in the beam to re...

AI Technical Summary

Problems solved by technology

Due to the relatively large volume of laser optical tweezers, it is not easy to move, and the cost is high. We propose a bidirectional tapered optical fiber for driving.

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