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Optics Letters

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  • Vol. 28, Iss. 20 — Oct. 15, 2003
  • pp: 1876–1878

Double-helix chiral fibers

Victor I. Kopp and Azriel Z. Genack  »View Author Affiliations


Optics Letters, Vol. 28, Issue 20, pp. 1876-1878 (2003)
http://dx.doi.org/10.1364/OL.28.001876


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Abstract

A polarization-selective photonic stop band is demonstrated in a new chiral fiber structure with double-helix symmetry. The stop band exists for only circularly polarized radiation with the same handedness as the structure and is centered at a wavelength in the fiber equal to the fiber pitch. When one part of the chiral fiber is twisted about its axis, a localized mode is produced, which can be tuned across the gap by changing the twist angle. Observations in single-mode fibers are in good agreement with one-dimensional simulations of a dispersive cholesteric material. At higher frequencies, however, we find a sharp onset of a broad polarization-selective scattering band, which is not present in one-dimensional simulations.

© 2003 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(230.5440) Optical devices : Polarization-selective devices

Citation
Victor I. Kopp and Azriel Z. Genack, "Double-helix chiral fibers," Opt. Lett. 28, 1876-1878 (2003)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-28-20-1876


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References

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