Observation of Resonances in the Radiation Pressure on Dielectric Spheres
We report an experimental check of the Mie-Debye theory for the variation of radiation pressure on dielectric spheres with wavelength and size using optical-levitation techniques. Sharp resonances are observed which are shown to be related to dielectric surface waves. They permit particle-size measurement to a precision of 1 part in ${10}^{5}$ to ${10}^{6}$.