Revista de láseres, óptica y fotónica

Optical Tweezers: Manipulating Microscopic Objects with Precision Lasers

Abstract

Andre Duane*

Optical tweezers have emerged as a revolutionary tool in the world of microscopy and biophysics. These devices use the power of precision lasers to manipulate microscopic objects, including individual cells, nanoparticles, and even single molecules. In this article, we explore the fascinating world of optical tweezers, delving into their underlying principles, the technology that makes them possible, and their wide-ranging applications. From biological research to nanotechnology, optical tweezers have transformed our ability to interact with the microscale world in ways previously unimaginable. Optical tweezers rely on the principles of optical trapping, where highly focused laser beams create a gradient of optical forces that can trap and manipulate tiny objects. The article will explain how these forces arise, including concepts like radiation pressure and gradient force. It will also discuss the importance of laser beam properties such as wavelength and polarization in optical trapping. Recent developments in laser technology and microscopy techniques have greatly improved the capabilities of optical tweezers. Advanced setups now incorporate multiple laser traps, feedback control systems, and real-time imaging to enhance precision and flexibility.