Optical solenoid beams
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United States of America Patent
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Dec 30, 2014
Grant Date -
Nov 8, 2012
app pub date -
Mar 19, 2012
filing date -
Mar 18, 2011
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Abstract
Optical solenoid beams, diffractionless solutions of the Helmholtz equation whose diffraction -limited in-plane intensity peak spirals around the optical axis, and whose wavefronts carry an independent helical pitch. The solenoid beams have the noteworthy property of being able to exert forces on illuminated objects that are directed opposite to the direction of the light's propagation. Optical solenoid beams therefore act as true tractor beams that are capable of transporting material back toward their source.
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