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

Abstract

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.

5 pages, 7 figures

References in corpus (4)

• Computer-Generated Holographic Optical Tweezer Arrays
• Optical binding of particles with or without the presence of a flat dielectric surface
• Coupled Dipole Method Determination of the Electromagnetic Force on a Particle over a Flat Dielectric Substrate
• Electromagnetic force on a metallic particle in presence of a dielectric surface

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• Selective nanomanipulation using optical forces
• Gradient Optics of subwavelength nanofilms
• Optical Forces Between Coupled Plasmonic Nano-particles near Metal Surfaces and Negative Index Material Waveguides
• Plasmonic Brownian ratchet
• Optical forces from evanescent Bessel beams, multiple reflections and Kerker conditions in magnetodielectric spheres and cylinders
• Optical force and torque on small particles induced by polarization singularities
• Fast Multipole Boundary Element Method for Three Dimensional Electromagnetic Scattering Problem
• Low-Power Optical Traps using Anisotropic Metasurfaces: Asymmetric Potential Barriers and Broadband Response
• Theory of Forces Induced by Evanescent Fields