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.
Original language | English |
---|---|
Article number | 123601 |
Pages (from-to) | 1-4 |
Number of pages | 4 |
Journal | Physical Review Letters |
Volume | 88 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2002 |
Externally published | Yes |