Optical Trapping and Manipulation of Nano-objects with an Apertureless Probe

Details Optical Trapping and Manipulation of Nano-objects with an Apertureless Probe Optical Trapping and Manipulation of Nano-objects with an Apertureless Probe

2003-05-12

arxiv.org/abs/physics/0305046v1

Phys. Rev. Lett., vol 88, 123601 (2002)

Physics

Optics

5 pages, 7 figures

Scientific paper

10.1103/PhysRevLett.88.123601

We propose a novel way to trap and manipulate nano-objects above a dielectric substrate using an apertureless near-field probe. A combination of evanescent illumination and light scattering at the probe apex is used to shape the optical field into a localized, three dimensional optical trap. We use the coupled-dipole method and the Maxwell stress tensor to provide a self-consistent description of the optical force, including retardation and the influence of the substrate. We show that small objects can be selectively captured and manipulated under realistic conditions.

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