Abstract not reproduced here by request of the publisher. The text is available from http://dx.doi.org/10.1117/12.685058.
Poster presented at the SPIE Optical Trapping and Optical Micromanipulation III Conference, San Diego, United States, 13-17 August 2006 / Kishan Dholakia and Gabriel C. Spalding (eds.),
Vol. 6326, paper no. 632630