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Dynamic size tuning of multidimensional optically bound matter
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SYSNO ASEP 0388101 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Dynamic size tuning of multidimensional optically bound matter Author(s) Brzobohatý, Oto (UPT-D) RID, ORCID, SAI
Karásek, Vítězslav (UPT-D) RID, SAI
Šiler, Martin (UPT-D) RID, ORCID, SAI
Zemánek, Pavel (UPT-D) RID, SAI, ORCIDNumber of authors 4 Source Title CPS 2012. 18th Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics (Proceedings of SPIE Vol.8697). - Bellingham : SPIE, 2012 - ISBN 978-0-8194-9481-8 Pages 86970u: 1-10 Number of pages 10 s. Publication form Print - P Action CPS 2012. Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics /18./ Event date 03.09.2012-07.09.2012 VEvent location Ostravice Country CZ - Czech Republic Event type EUR Language eng - English Country US - United States Keywords optical binding ; optical tweezers ; dual-beam trap ; self-arrangement ; colloids Subject RIV BH - Optics, Masers, Lasers R&D Projects GA202/09/0348 GA ČR - Czech Science Foundation (CSF) GPP205/11/P294 GA ČR - Czech Science Foundation (CSF) ED0017/01/01 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UPT-D - RVO:68081731 UT WOS 000319864100030 EID SCOPUS 84875929010 DOI 10.1117/12.2001101 Annotation Optical binding presents an original method for self- arrangement of solid microparticles in liquid or air. The resulting equilibrium positions of the particles in an optically bound structure (OBS) are not only influenced by the spatial intensity profiles of the incident laser beams but also by the light scattered from all the bound particles. The inter-particle distances in OBSs can be externally modified by changing the refractive index of the medium or the spatial intensity distribution of the beams. Especially the last option is now well developed due to the technology of spatial light modulators (SLM). We utilized this tool to generate OBSs in counterpropagating laser beams having various spatial intensity profiles. In contrast to the previous methods, where OBSs were kept stationary without dynamic control, we modified dynamically the optical cage for self-arranged particles which led to enlargement or shrinking of the OBS. Using elaborate optical fields suitable for particular cases we demonstrated the size tunability of OBSs that were self-arranged along one, two or three dimensions. Compressing of the optical cage below a certain limit led to a collapse of the self-arranged micro-structures, thus indicating a phase transitions in such colloidal structures. Within a system of counter-propagating optical vortices we observed transfer of angular momentum of light to two-dimensional OBSs, revolving around the intrinsic on-axis phase singularity of the trapping beams. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2013
Number of the records: 1