Demonstration of multi-dimensional optical binding in counter-propagating laser beams with variable beam properties

0368395 - ÚPT 2012 RIV US eng C - Conference Paper (international conference)
Brzobohatý, Oto - Karásek, Vítězslav - Čižmár, T. - Zemánek, Pavel
Demonstration of multi-dimensional optical binding in counter-propagating laser beams with variable beam properties.
Optical Trapping and Optical Micromanipulation VIII (Proceedings of SPIE Vol. 8097). Bellingham: SPIE, 2011, 80970U:1-8. ISBN 978-0-8194-8707-0.
[Conference on Optical Trapping and Optical Micromanipulation VIII. San Diego (US), 21.08.2011-25.08.2011]
R&D Projects: GA ČR GA202/09/0348; GA ČR GPP205/11/P294; GA MŠMT(CZ) LC06007; GA MŠMT ED0017/01/01
Institutional research plan: CEZ:AV0Z20650511
Keywords : optical binding * optical tweezers * dual-beam trap * self-arrangement * colloids
Subject RIV: BH - Optics, Masers, Lasers

We report on dynamic modifications of the size of micro-structures self-arranged in counter-propagating laser beams by means of beams width changing. In contrast to previous published results, where the optically bound structures were kept stationary without dynamic control, here we present a method that allows dynamic modification of the self-arranged structure employing shrinking or enlargement of the "optical cage" where the particles are kept. We show the full potential of this method and demonstrate tunable optical self-arrangement of particles in one-dimension using a pair of counter-propagating Bessel beams or Gaussian beams, in two-dimensions far from the surface using a pair of counter-propagating elliptical Gaussian beams, in three-dimensions using three pairs of counter-propagating Gaussian beams arranged in space.
Permanent Link: http://hdl.handle.net/11104/0202752