title: Single and dual fiber nano-tip optical tweezers: trapping and analysis.
abstract: An original optical tweezers using one or two chemically etched fiber nano-tips is developed. We demonstrate optical trapping of 1 micrometer polystyrene spheres at optical powers down to 2 mW. Harmonic trap potentials were found in the case of dual fiber tweezers by analyzing the trapped particle position fluctuations. The trap stiffness was deduced using three different models. Consistent values of up to 1 fN/nm were found. The stiffness linearly decreases with decreasing light intensity and increasing fiber tip-to-tip distance.
authors: Jean-Baptiste
authors: JB
authors: Decombe
authors: Serge
authors: S
authors: Huant
authors: Jochen
authors: J
authors: Fick
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008962:Models, Theoretical; D036103:Nanotechnology / Q000295:instrumentation*; D052898:Optical Tweezers; D014159:Transducers