The boundary-value problem for a Dyakonov–Tamm wave guided by a twist defect in a structurally chiral material and propagating along the bisector of the twist defect was formulated. The resulting dispersion equation was numerically solved. Detailed analysis showed that either two or three different Dyakonov–Tamm waves can propagate, depending on the value of the twist angle. These waves have different phase speeds and degrees of localization to the twist–defect interface.
© 2009 Optical Society of America
Original Manuscript: March 23, 2009
Revised Manuscript: May 22, 2009
Manuscript Accepted: June 1, 2009
Published: June 18, 2009
Jun Gao, Akhlesh Lakhtakia, John A. Polo, Jr., and Mingkai Lei, "Dyakonov-Tamm wave guided by a twist defect in a structurally chiral material," J. Opt. Soc. Am. A 26, 1615-1621 (2009)