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Polygonal micro-whirlpools induced in ferrofluids.

Authors :
BACIA, MARCIN
LAMPERSKA, WERONIKA
MASAJADA, JAN
DROBCZYŃSKI, SŁAWOMIR
MARC, MACIEJ
Source :
Optica Applicata. 2015, Vol. 45 Issue 3, p309-316. 8p.
Publication Year :
2015

Abstract

We report on the observation of the polygonal whirlpools in the thin layer of ferrofluid under illumination with a laser beam carrying optical vortex and in the presence of a vertical magnetic field. This kind of structures have attracted attention after discovering a hexagonal storm in Saturn's atmosphere. Our polygonal whirlpools were created in a closed system (no free surfaces) in micro-scale (whirlpool diameter <20 µm) by the use of holographic optical tweezers. The polygonal shape was changed by varying the magnetic field strength or value of the optical vortex topological charge. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00785466
Volume :
45
Issue :
3
Database :
Academic Search Index
Journal :
Optica Applicata
Publication Type :
Academic Journal
Accession number :
111831175
Full Text :
https://doi.org/10.5277/oa150304