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Optical Engineering

Singular beams in metrology and nanotechnology
Author(s): Joseph Shamir
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Paper Abstract

Optical singularities are localized regions in a light field where one or more of the field parameters, such as phase or polarization, become singular with associated zero intensity. Focused on a small spot, the electromagnetic field around the singularity has interesting characteristics, especially when it interacts with matter. The light scattered by a material object within the strongly varying optical field around the singularity is extremely sensitive to changes and can be exploited for metrology with high sensitivity and the study of physical processes on a nanometer scale. Several earlier application examples are briefly described and a more detailed presentation is provided of a novel approach to particle sizing down into the nanometer region.

Paper Details

Date Published: 6 July 2012
PDF: 9 pages
Opt. Eng. 51(7) 073605 doi: 10.1117/1.OE.51.7.073605
Published in: Optical Engineering Volume 51, Issue 7
Show Author Affiliations
Joseph Shamir, Technion-Israel Institute of Technology (Israel)

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