Force trapping gradient using diffractive optical elements

Moradi, Ali-Reza, Ferrari, Enrico, Garbin, Valeria , Di Fabrizio, Enzo and Cojoc, Dan (2006) Force trapping gradient using diffractive optical elements. In: Optical Trapping and Optical Micromanipulation III, 13 August 2006, San Diego, California.

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Item Type:Conference or Workshop contribution (Paper)
Item Status:Live Archive


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.

Keywords:optical force gradients
Subjects:F Physical Sciences > F310 Applied Physics
Divisions:College of Science > School of Life Sciences
ID Code:8406
Deposited On:27 Mar 2013 19:39

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