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Optics Letters

Optics Letters


  • Vol. 27, Iss. 18 — Sep. 15, 2002
  • pp: 1640–1642

Second-harmonic generation of polarization singularities

Isaac Freund  »View Author Affiliations

Optics Letters, Vol. 27, Issue 18, pp. 1640-1642 (2002)

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Second-harmonic generation was studied theoretically for the vector singularities (daisy modes) of linearly polarized light and for the elliptic singularities (C points) of elliptically polarized light. Topological charge doubling for C points and daisy modes, similar to that found for vortices, was found. Unlike for vortices, however, it was found that for both C points and daisy modes the sign of the charge is reversed; for C points the photon spin or handedness (right or left) is also reversed; and for daisy modes the number of intensity petals is not doubled. These findings are all unexpected because neither charge nor spin nor orbital angular momentum is conserved for C points, whereas a daisy mode in which the number of intensity petals does not equal twice the magnitude of the charge is anomalous.

© 2002 Optical Society of America

OCIS Codes
(190.0190) Nonlinear optics : Nonlinear optics
(190.2620) Nonlinear optics : Harmonic generation and mixing
(190.7070) Nonlinear optics : Two-wave mixing
(260.0260) Physical optics : Physical optics
(260.2130) Physical optics : Ellipsometry and polarimetry
(260.5430) Physical optics : Polarization

Isaac Freund, "Second-harmonic generation of polarization singularities," Opt. Lett. 27, 1640-1642 (2002)

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