Force trapping gradient using diffractive optical elements

R. Moradi; E. Ferrari; V. Garbin; E. Di Fabrizio; D. Cojoc

doi:10.1117/12.680724

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11 September 2006 Force trapping gradient using diffractive optical elements

R. Moradi, E. Ferrari, V. Garbin, E. Di Fabrizio, D. Cojoc

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Proceedings Volume 6326, Optical Trapping and Optical Micromanipulation III; 63262V (2006) https://doi.org/10.1117/12.680724
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

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.

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R. Moradi, E. Ferrari, V. Garbin, E. Di Fabrizio, and D. Cojoc "Force trapping gradient using diffractive optical elements", Proc. SPIE 6326, Optical Trapping and Optical Micromanipulation III, 63262V (11 September 2006); https://doi.org/10.1117/12.680724

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