標題: Laser Trapping-Induced Reconfiguration of Individual Smectic Liquid Crystal Micro-Droplet Showing Size-Dependent Dynamics
作者: Usman, Anwar
Chiang, Wei-Yi
Uwada, Takayuki
Masuhara, Hiroshi
應用化學系
Department of Applied Chemistry
關鍵字: liquid crystal droplets;4 '-n-pentyl-4-cyanobiphenyl;laser trapping;polarization optical microscopy;wide-field illumination
公開日期: 2012
摘要: We present laser trapping behavior of individual smectic 4'-n-pentyl-4-cyanobiphenyl liquid crystalline micro-droplet dispersed in heavy water; in particular, laser trapping-induced molecular reconfiguration of the optically trapped droplet when the laser trapping power is above a definite threshold. The reconfiguration undergoes throughout the inside of the droplets even though their size is larger than the focal spot, and the threshold laser power depends on the droplet size. We propose that the reconfiguration mechanism involves optical reorientation at the focal volume competing with the droplet-liquid interfacial anchoring effect, leading to symmetry breaking throughout the inside of the optically confined droplet. With this mechanism, we qualitatively described the existence of the threshold power and the dependence of the threshold upon the droplet size.
URI: http://hdl.handle.net/11536/15415
http://dx.doi.org/10.1117/12.906305
ISBN: 978-0-81948-917-3
ISSN: 0277-786X
DOI: 10.1117/12.906305
期刊: COMPLEX LIGHT AND OPTICAL FORCES VI
Volume: 8274
Appears in Collections:Conferences Paper


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