Optical Tweezers and Their Applications in Biomedical Engineering

Optical tweezers is a tool based on strongly focused laser beam trapping force. The force of a laser beam originates from the gradient of electric field containing in the focused laser beam. Laser tweezers has been used increasingly as a unique technique for optical trapping, manipulation, and characterizations of biological cells and dielectric micro- and nano-scale particles. It can also be used to make quantitative measurements of living cells.