Implementation And Testing Of An Optical Tweezers For Capture And Manipulation Of Microparticles

Abstract:

The optical micromanipulation of nano and microparticles is of great current interest. To improve our ability to venture into this area, we have reviewed and assembled the parts of an optical tweezers to achieve the entrapment and manipulation of microparticles in our laboratory. The experimental arrangement combines a beam expansion system∼ 4X, a focusing system based on a microscope lens with NA 1.25, combined with an observation system1. The system focuses the laser beam (658nm) in a very small area to achieve the greatest possible effect on the trapped particles. Changing several times, the assembly system has sought to obtain the main features that the arrangement must present for proper operation such as: alignment of the red laser, collimation of the laser beam, and better focus of the particles1. As sample, we were used polystyrene microparticles (2.6 µm). This system allows us to study one of …

Año de publicación:

2021

Keywords:

Fuente:

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