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Proceedings Paper

Force trapping gradient using diffractive optical elements
Author(s): R. Moradi; E. Ferrari; V. Garbin; E. Di Fabrizio; D. Cojoc
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Paper Abstract

We discuss a new technique to generate force gradient in arrays of optical traps. The arrays can be configured in two or three dimensions by means of phase diffractive optical elements displayed on a spatial light modulator. The design of the diffractive optical elements is based on the approach of spherical wave propagation and superposition, which enables to individually control the strength of each optical trap. Computer simulation and experimental results are discussed for two and three dimensional arrays of traps. An example with silica micro-beads trapped with different forces in two different planes is presented to demonstrate the validity of our approach.

Paper Details

Date Published: 11 September 2006
PDF: 7 pages
Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 63262V (11 September 2006); doi: 10.1117/12.680724
Show Author Affiliations
R. Moradi, Institute for Advanced Studies in Basic Sciences (Iran)
E. Ferrari, CNR-INFM, Lab. Nazionale TASC (Italy)
Univ. of Trieste (Italy)
V. Garbin, CNR-INFM, Lab. Nazionale TASC (Italy)
Univ. of Trieste (Italy)
E. Di Fabrizio, CNR-INFM, Lab. Nazionale TASC (Italy)
Univ. of Magna Graecia (Italy)
D. Cojoc, CNR-INFM, Lab. Nazionale TASC (Italy)

Published in SPIE Proceedings Vol. 6326:
Optical Trapping and Optical Micromanipulation III
Kishan Dholakia; Gabriel C. Spalding, Editor(s)

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