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Polarisation singularities of optical beam propagating in imperfect quartz crystals
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Vasylkiv Yu., Savaryn V., Smaga I., Skab I. and Vlokh R.

Abstract. We have revealed experimentally polarisation singularities in the optical beam propagating through quartz crystals along the direction of optic axis and discussed their origin. It has been supposed that the singularities are caused by a screw dislocation of crystalline structure.

Keywords: crystalline structure, dislocations, polarisation singularities, optical vortices

PACS: 42.50.Tx, 78.20.Fm, 42.50.-p, 78.20.hb, 61.50.-f, 61.72.Ff
UDC: 535.5, 548.4
Ukr. J. Phys. Opt. 13 204-206
doi: 10.3116/16091833/13/4/204/2012

Received: 02.10.2012

Анотація. Експериментально виявлено поляризаційні сингулярності в промені, що поширюється вздовж оптичної осі в кристалах кварцу, та обговорено природу цих сингулярностей. Припускається, що вони спричинені гвинтовими дислокаціями кристалічної структури.

  1. Skab I, Smaga I, Savaryn V, Vasylkiv Yu and Vlokh R, 2011. Torsion method for measuring piezooptic coefficients. Cryst.Res.Technol. 46: 23–36. doi:10.1002/crat.201000495 
  2. Vasylkiv Y, Savaryn V, Smaga I, Skab I and Vlokh R. 2011. On determination of sign of the piezooptic coefficients using torsion method. Appl. Opt. 50: 2512–2518. doi:10.1364/AO.50.002512 
  3. Vasylkiv Yu, Savaryn V, Smaga I, Skab I and Vokh R, 2010. Determination of piezooptic coefficient π14 of LiNbO3 crystals under torsion loading. Ukr. J. Phys. Opt. 11: 156–164. doi:10.3116/16091833/11/3/156/2010 
  4. Skab I, Vasylkiv Yu, Savaryn V and Vlokh R, 2010. Relations for optical indicatrix parameters in the conditions of crystal torsion. Ukr. J. Phys. Opt. 11 193–240. doi:10.3116/16091833/11/4/193/2010 
  5. Shaskolskaya M P, Acoustic crystals. Moscow: Nauka (1982). doi:10.1557/PROC-14-177 
  6. Skab I, Vasylkiv Yu, Savaryn V and Vlokh R, 2011. Optical anisotropy induced by torsion stresses in LiNbO3 crystals: appearance of an optical vortex. J. Opt. Soc. Amer. A. 28: 633–640. doi:10.1364/JOSAA.28.000633 
  7. Berry M V, Jeffrey M R and Mansuripur M, 2005. Orbital and spin angular momentum in conical diffraction. J. Opt. A: Pure & Appl. Opt. 7: 685–690. doi:10.1088/1464-4258/7/11/011 
  8. Friedel J, Dislocations. Oxford: Pergamon Press (1964). 
  9. Chuan zhen Ge, 1991. Birefringence images of screw dislocations viewed end-on in cubic crystals. J. Appl. Phys. 69: 7556–7564. doi:10.1063/1.347573 
  10. Chuvyrov A N, Mazitov R M, Kalimgulov A R and Lebedev Yu A, 2009. The structure and properties of quartz crystals grown from fluoride solutions: Part II. The Burgers vector of the growth screw superdislocations. Crystallogr. Rep. 54: 692–696. doi:10.1134/S1063774509040257
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