Abstract
By introducing CW and pulsed lasers into optical microscope, we have set up a laser trapping spectroscopy-ablation system which enables us to study spectroscopic and dynamic properties of an individual single particle in solution. We demonstrated three-dimensional laser trapping of various, μm-order particles and determined the trapping force to be in the order of pN. When a laser-trapped particle was further irradiated by a pulsed laser, ablative penetration of the particle by a minute hole was observed. It was demonstrated, furthermore, that a single microcapsule containing organic reagents was chosen, transferred, and ablated to eject the inner organic solution in an arbitrary spatial position by the present technique. A manipulation tool for controlling chemical reactions in the μm-size volume is now realized by this technique.
