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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry Van Driel
  • Vol. 26, Iss. 12 — Dec. 1, 2009
  • pp: B74–B82

On Dyakonov–Tamm waves localized to a central twist defect in a structurally chiral material

Jun Gao, Akhlesh Lakhtakia, and Mingkai Lei  »View Author Affiliations


JOSA B, Vol. 26, Issue 12, pp. B74-B82 (2009)
http://dx.doi.org/10.1364/JOSAB.26.000B74


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Abstract

The boundary-value problem of the propagation of Dyakonov–Tamm waves localized to a central twist defect in a structurally chiral material was formulated and numerically solved. The angular magnitude of the twist defect and the orientation of the twist defect relative to the direction of propagation were varied. Detailed analysis showed that either two or three different Dyakonov–Tamm waves can propagate, depending on the angular magnitude and the orientation of the twist defect. These waves have different phase speeds and degrees of localization to the twist–defect interface. The most localized Dyakonov–Tamm waves are essentially confined to within two structural periods of the twist–defect interface on either side.

© 2009 Optical Society of America

OCIS Codes
(160.1190) Materials : Anisotropic optical materials
(240.6690) Optics at surfaces : Surface waves
(260.2110) Physical optics : Electromagnetic optics

History
Original Manuscript: July 17, 2009
Manuscript Accepted: August 24, 2009
Published: October 6, 2009

Citation
Jun Gao, Akhlesh Lakhtakia, and Mingkai Lei, "On Dyakonov-Tamm waves localized to a central twist defect in a structurally chiral material," J. Opt. Soc. Am. B 26, B74-B82 (2009)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-26-12-B74


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