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

@article{Loiko2013GeneratingAT,
  title={Generating a three-dimensional dark focus from a single conically refracted light beam.},
  author={Yu V Loiko and Alex Turpin and Todor K. Kalkandjiev and Edik U. Rafailov and Jordi Mompart},
  journal={Optics letters},
  year={2013},
  volume={38 22},
  pages={4648-51}
}
We report here the generation of a three-dimensional (3D) 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 3D dark focus with null intensity at the ring center is formed. We have performed… CONTINUE READING