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Appearance of Optical Vortex at Conical Refraction. Examples
of NaNO2 and YFeO3 Crystals
1Vlokh R., 2Volyar A., 1Mys O.,
1Krupych O.
1Institute of Physical Optics, 23 Dragomanov
Street, 79005 L’viv, Ukraine
2Physical Department, National Tavrida
V.Vernandsky University, 4 Yaltinska Street, 95007 Simpheropol, Crimea,
Ukraine
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In the present paper it is shown that effect of conical refraction is
accompanied by a generation of vortex due to the existing singularities
on the surfaces of phase and group velocities in biaxial crystals. This
fact is confirmed experimentally by the studies of conical refraction in
YFeO3 and interference patterns in NaNO2 crystals. The angle of external
conical refraction in YFeO3 crystals determined by us is equal to 4.2o.
Key words: conical refraction, optical vortex, biaxial crystals
PACS: 42.15.Dp, 78.20.Fm, 65.57.Fg
doi 10.3116/16091833/4/2/90/2003 |
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