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arXiv · 1409.1853

Generating a three dimensional dark focus from a single conically refracted light beam

Yu. V. Loiko·A. Turpin·T. K. Kalkandjiev·E. U. Rafailov·J. Mompart
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Abstract

We report here the generation of a three dimensional dark focus from a single focused monochromatic Gaussian beam that undergoes conical refraction when it propagates along one of the optic axes of a biaxial crystal. We study the resulting ring intensity pattern behind the crystal as a function of the ratio between the ring radius and the beam waist and derive the particular parameter values for which a three dimensional dark focus with null intensity at the ring center is formed. We have performed experiments with a ${\rm KGd(WO_4)_2}$ biaxial crystal reporting the generation of a bottle beam in full agreement with our theoretical investigations.

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Yu. V. Loiko, A. Turpin, T. K. Kalkandjiev, E. U. Rafailov, J. Mompart. 2014-09-05. Generating a three dimensional dark focus from a single conically refracted light beam. https://doi.org/10.1364/ol.38.004648

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