Laser Manipulation Using Nonlinear Optical Responses
Abstract
Optical manipulation is a technique for controlling mechanical motion of small objects with radiation forces, and have been widely used in the fields of nano- and bio-science. So far radiation forces due to non-resonant, linear optical responses have normally been used for laser manipulation. However, optical manipulation based on resonant and/or nonlinear optical responses of materials has recently proposed and demonstrated in theoretical and experimental studies In the upcoming M1 colloquium, I am going to introduce experimental studies of optical manipulation using (1) stimulated emission and (2) excited state absorption, as multiphoton processes. In the first topic, negative photon force due to stimulated emission was successfully detected. While in the second one, photon force acting on a small particle was modulated by producing excited state of molecules contained in the particle.