Optical rotation of microscopic particles

H - Electricity – 05 – H

Patent

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H05H 3/04 (2006.01) G21K 1/00 (2006.01)

Patent

CA 2431945

Apparatus for and a method of rotating microscopic objects uses a beam of electromagnetic radiation. A microscopic, non-circularly symmetric distribution of electro-magnetic radiation is projected on to a region containing an object to be rotated so as to cause photons in the beam to refract around the objects. Rotating means then rotate that distribution and so rotate the objects. The distribution may be formed on the interference pattern between a beam having a Laguerre-Gaussian wave fronts and either a plane wave or a further Laguerre-Gaussian beam of opposite helicity.

L'invention concerne un procédé et un appareil de rotation d'objets microscopiques utilisant un faisceau de rayonnement électromagnétique. Une distribution symétrique, microscopique et non circulaire d'un rayonnement électromagnétique est projetée sur une surface contenant un objet devant être entraîné en rotation de façon à amener les photons du faisceau à se réfracter sur les objets. Un moyen de rotation entraîne en rotation ladite distribution, et avec elle les objets en question. Cette distribution peut être réalisée sur le diagramme d'interférence entre un faisceau présentant un front d'ondes Laguerre-Gaussien et soit une onde plan, soit un faisceau Laguerre-Gaussien à hélicité opposée.

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