A graphene-based light manipulation system and light manipulation method

Abstract

The invention discloses a graphene-based light operation-control system. The system comprises a target particle at a target position and a wave beam generating apparatus; the target particle is a core-shell structure, and comprises core-layer graphene and shell-layer graphene; and the wave beam generating apparatus is used for generating a first-order Bessel wave beam to illuminate the target particle, so that respective electric dipole modes of the core-layer graphene and the shell-layer graphene are coupled with respective electric quadrupole modes to form Fano resonances, a light pulling force directed to the wave beam generating apparatus is applied to the target particle, and the target particle is moved to the wave beam generating apparatus. By illumination of the first-order Besselwave beam, forward scattering can be promoted while backward scattering can be suppressed, so that a relatively large negative optical force is obtained, movement of the target particle by pulling thetarget particle along a direction of the wave beam generating apparatus is realized, a distance between the target particle and the wave beam generating apparatus is shortened, and thereby movement of the target particle is realized. The invention also provides a light operation-control method which has the above beneficial effects.

Description

technical field [0001] The present invention relates to the field of optical technology, in particular to a graphene-based light manipulation system and a graphene-based light manipulation method. Background technique [0002] Optical force, mainly divided into gradient force and scattering force, plays an important role in the manipulation of micro-nano particles. In 1986, Ashkin and others successfully captured dielectric particles with a strongly focused Gaussian beam. The principle is to use the gradient force induced by the gradient field to stabilize the particle in the center of the beam, and move the particle by moving the beam. This technology Known as optical tweezers or optical traps. Since then, optical tweezers have been used as a powerful optical tool with very important applications in biological sciences, chemistry, and atomic physics. Subsequent studies have shown that particles can be manipulated not only by gradient forces, but also by scattering forces....

AI Technical Summary

Problems solved by technology

[0003] At the current stage, the beam can usually only fix the particles within the beam irradiation range, or push the particles away from the beam generator, but cannot pull the particles toward the beam generator, shortening the distance between the beam generator and the particles. distance, so that the particles cannot move freely through the beam

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