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Optics Letters

Optics Letters


  • Vol. 29, Iss. 23 — Dec. 1, 2004
  • pp: 2788–2790

Bragg-induced orbital angular-momentum mixing in paraxial high-finesse cavities

David H. Foster and Jens U. Nöckel  »View Author Affiliations

Optics Letters, Vol. 29, Issue 23, pp. 2788-2790 (2004)

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Numerical calculation of vector electromagnetic modes of plano–concave microcavities reveals that the polarization-dependent reflectivity of a flat Bragg mirror can lead to unexpected cavity field distribution for nominally paraxial modes. Even in a rotationally symmetric resonator, certain pairs of orbital angular momenta are necessarily mixed in an excitation-independent way to form doublets. A characteristic mixing angle is identified, which even in the paraxial limit can be designed to have large values. This correction to Gaussian theory is of zeroth order in deviations from paraxiality. We discuss the resultant nonuniform polarization fields. Observation will require small cavities with sufficiently high Q. Possible applications are proposed.

© 2004 Optical Society of America

OCIS Codes
(230.3990) Optical devices : Micro-optical devices
(230.5440) Optical devices : Polarization-selective devices
(230.5750) Optical devices : Resonators
(260.5430) Physical optics : Polarization

David H. Foster and Jens U. Nöckel, "Bragg-induced orbital angular-momentum mixing in paraxial high-finesse cavities," Opt. Lett. 29, 2788-2790 (2004)

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  1. M. Padgett, J. Courtial, and L. Allen, Phys. Today 57(5), 35 (2004).
  2. D. G. Grier, Nature 424, 810 (2003).
  3. T. M. Stace, G. J. Milburn, and C. H. W. Barnes, Phys. Rev. B 67, 085317 (2003).
  4. D. H. Foster and J. U. Nöckel, Opt. Commun. 234, 351 (2004).
  5. D. H. Foster and J. U. Nöckel, Proc. SPIE 5333, 195 (2004).
  6. V. M. Babic and V. S. Buldyrev, Short-Wavelength Diffraction Theory (Springer-Verlag, Berlin, 1972).
  7. J. U. Nöckel and D. H. Foster are preparing a manuscript entitled “Coupling of optical Born–Oppenheimer modes in near-paraxial microcavities.”
  8. E. J. Galvez, P. R. Crawford, H. I. Sztul, M. J. Pysher, P. J. Haglin, and R. E. Williams, Phys. Rev. Lett. 90, 203901 (2003).

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