29 August 2008 Engineering optically driven micromachines
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Abstract
Optical forces and torques acting on microscopic objects trapped in focussed laser beams promise flexible methods of driving micromachines through a microscope cover slip or even a cell wall. We are endeavouring to engineer special purpose micro-objects for a range of tasks. Colloidal self assembly of calcium carbonate provides birefringent spheres which can exert considerable torque, while two photon polymerisation allows us to fabricate objects of arbitrary shape that can be designed to exchange both spin and orbital angular momentum. Numerical calculations of forces and torques can allow an optimal design, and optical measurements provide us with certain knowledge of the forces and torques which are actually exerted.
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Theodor Asavei, Theodor Asavei, Simon Parkin, Simon Parkin, Martin Persson, Martin Persson, Robert Vogel, Robert Vogel, Maren Funk, Maren Funk, Vincent Loke, Vincent Loke, Timo Nieminen, Timo Nieminen, Halina Rubinsztein-Dunlop, Halina Rubinsztein-Dunlop, Norman Heckenberg, Norman Heckenberg, } "Engineering optically driven micromachines", Proc. SPIE 7038, Optical Trapping and Optical Micromanipulation V, 703816 (29 August 2008); doi: 10.1117/12.798529; https://doi.org/10.1117/12.798529
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