Abstract
We have developed a holographic optical tweezers system based on diffractive optical elements (DOEs) implemented on a liquid crystal spatial light modulator (LC-SLM) able to generate fine positioned traps on the sample. Our own algorithms and cede allows to calculate phase DOEs that can transform a single laser beam into an array of independent traps, each with individually specified characteristics, arranged in arbitrary three-dimensional (3D) geometrical configurations. Different DOEs can be dynamically projected to the SLM in order to achieve a rearrangement of the configuration of the trapping spots. Silica or latex micro-beads are trapped hi different configurations of spots to demonstrate the fine control capability on each trap. Our setup is built on a standard video microscope coupled with a laser source, a spatial light modulator and a three axis nano-positioning system. It allows to obtain 3D multi-trapping and a fine calibration for the positioning of the traps.
| Original language | English (US) |
|---|---|
| Article number | 597203 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 5972 |
| DOIs | |
| State | Published - 2005 |
| Externally published | Yes |
| Event | Advanced Topics in Optoelectronics, Microelectronics, and Nanotechnologies II - Bucharest, Romania Duration: Nov 24 2004 → Nov 26 2004 |
Keywords
- Diffractive optical elements
- Liquid crystal spatial light modulator
- Optical tweezers
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering