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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 3 — Jan. 31, 2011
  • pp: 2580–2588

The creation and annihilation of optical vortices using cascade conical diffraction

D. P. O’Dwyer, C. F. Phelan, Y. P. Rakovich, P. R. Eastham, J. G. Lunney, and J. F. Donegan  »View Author Affiliations

Optics Express, Vol. 19, Issue 3, pp. 2580-2588 (2011)

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Internal conical diffraction produces a superposition of orthogonally polarised zero- and first-order Bessel like beams from an incident circularly polarised Gaussian beam. For right-circularly polarised light, the first-order beam has an optical vortex of charge −1. Upon propagation of the first-order beam through a second biaxial crystal, a process which is termed cascade conical refraction, the generated beam is a superposition of orthogonally polarised fields of charge 0 and −1 or 0 and −2. This spin to orbital angular momentum conversion provides a new method for the generation and annihilation of optical vortices in an all-optical arrangement that is solely dependent on the incident polarisation and vortex handedness.

© 2011 OSA

OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(260.1180) Physical optics : Crystal optics
(260.1440) Physical optics : Birefringence
(350.5030) Other areas of optics : Phase

ToC Category:
Physical Optics

Original Manuscript: December 22, 2010
Revised Manuscript: January 10, 2011
Manuscript Accepted: January 17, 2011
Published: January 26, 2011

D. P. O’Dwyer, C. F. Phelan, Y. P. Rakovich, P. R. Eastham, J. G. Lunney, and J. F. Donegan, "The creation and annihilation of optical vortices using cascade conical diffraction," Opt. Express 19, 2580-2588 (2011)

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