Isolation and Trapping using Optical Tweezers

Philip Jones traces the development of optical tweezers from early ideas about light exerting force on matter. The lecture follows Kepler’s observations of comet tails, Maxwell’s account of radiation pressure and Ashkin’s trapping experiments. It then examines how a focused light field can isolate and manipulate individual microscopic particles. Applications extend beyond the biological work recognised by the 2018 Nobel Prize to chemical and physical research, where gentle manipulation and isolation from surrounding material provide distinctive experimental tools.