Micro-step localization using double charge optical vortex interferometer

doi:10.1364/OE.17.016144

Micro-step localization using double charge optical vortex interferometer

2009-08-26

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DOI：10.1364/OE.17.016144

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Abstract

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We investigate the diffraction effects of focused Gaussian beams yielding a double optical vortex by a nano-step structure fabricated in a transparent media. When approaching such a step the double vortex splits into single ones which move in a characteristic way. By observing this movement we can determine the position of the step with high resolution. Our theoretical predictions were verified experimentally.

Keywords:

GAUSSIAN BEAMS

FOCUSED-BEAM

GENERATION

VORTICES

MICROSCOPY

Micro-step localization using double charge optical vortex interferometer

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