Micro-Nano Probe Positioning Operation Technology Research

The article studies the fiber optic probe laser AFM probe composite transmission system through analysis the advantages and disadvantages of a single probe and optical fiber optical tweezers nanoparticles operation method,the compound system has unique advantages and development potential.At the same time it has the capture the advantages of non-contact. no damage, but the system is difficult to control the operating position in the process of operation.The double probe composite technology can achieve nanoscale objects positioning operation.First this article introduces the origin of nanomanipulation, nano operation can be divided into single probe two-dimensional push、optical fiber laser optical tweezers capture operation and near-field capture three kinds of operation. With highlighting the operation method of the two shortcomings, we advocates for the principle of near-field capture, at the same time on with combining the system with AFM.The principle of near-field capture is light irradiation,there is the evanescent field of the surface subwavelength area in the nanoparticles the surface, the new nanoparticles surface enhanced evanescent field will produce when this evanescent field irradiates nanoparticles, this can enhance the evanescent field to operate nanoparticles.AFM processing module vector scanning mode can set route to achieve nanoscale object positioning mobile operation.With the Comsol, true software simulation analysis is carried out on the optical fiber probe and probe the evanescent field enhancement factor. Finally, the simulation analysis is carried out on the double probe coupling system,by finding out the influence factors of improvedevanescent field intensity, provide theory support for the follow-up work.Analyzed the AFM probe positioning operation nanoparticles would not produce particles movement in accordance with the expected route and fail to reach the specified point, through the establishment of the nanoparticles based on AFM operating model and function between probe and particles in the basal diagram analysis of nano particle movement.There are resistance in the process of particle movement,through calculating the van der Waals repulsion force, capillary force, contact, nano friction, electrostatic force, then reference previous optical trap force calculation method of particle motion the dynamic optical trap force can be obtained and the comparative analysis.Simulation experiment needs to set parameters and material parameters to the structure of the probe,at the same time we should be set simulation boundary conditions according to certain conditions for analyzing the effect elements of restricting the needlepoint evanescent field We should adopt simulation experiment with different factors of optical fiber probe,such as the film thickness, the output aperture, double probe composite, irradiation Angle factors,comparing the needlepoint maximum enhanced electric field factors,then we continue experiment according to the obtained optimal parameters.First we should preparation of moderate concentration of substrate samples,then set the path to the nanoparticles by using the vector scanning module in AFM Probe fixed point and position nanoparticles experimental operation.Finally enhanced evanescent field of coated optical fiber probe transmission of laser probe nanoscale can complete positioning mobile operation object.The Research of Micro-nano positioning operation technology will provides reference for the operation of near field non-contact,the micro-nano structure of microbial operation processing、manufacturing and nanometer level is of great significance.