Exact calculations of the near-field electromagnetic force on a nanoparticle exerted by the presence of a corrugated dielectric interface are carried out. The illumination of this system excites the particle eigenmodes. The calculation is two-dimensional, so the nanoparticle is actually a nanocylinder that scans parallel to the interface. This system constitutes a model of force transduction and surface topography imaging for a photonic-force microscope with signal enhancement owing to morphological resonance excitation of the probe.
© 2001 Optical Society of America
(170.5810) Medical optics and biotechnology : Scanning microscopy
(260.2110) Physical optics : Electromagnetic optics
(260.5740) Physical optics : Resonance
(290.4210) Scattering : Multiple scattering
M. Lester, J. R. Arias-González, and M. Nieto-Vesperinas, "Fundamentals and model of photonic-force microscopy," Opt. Lett. 26, 707-709 (2001)