Use of a One-dimensional Optical Tweezer to Measure Stochastic Resonance in a Colloidal System
Abstract
A spatial light modulator (SLM) can be used as a diffractive optical element to produce arbitrary patterns of optical tweezers. It can also be used to mimic the effect of lenses in an optical train. We use an SLM to mimic a cylindrical lens and generate a line tweezer. Dielectric colloidal particles trapped in such a tweezer are free to move along the line, but trapped in perpendicular directions. We examine Brownian motion in this one-dimensional potential. Apodization effects rising from the pixellation of the SLM lead to a structure in this potential. A colloidal particle trapped in this structured potential is an interesting system in which to test stochastic resonance in one dimension.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2003
- Bibcode:
- 2003APS..MARN13010S