Dyakonov-Tamm wave guided by a twist defect in a structurally chiral material

作者:Gao Jun; Lakhtakia Akhlesh*; Polo John A Jr; Lei Mingkai
来源:Journal of the Optical Society of America A-Optics Image Science and Vision, 2009, 26(7): 1615-1621.
DOI:10.1364/josaa.26.001615

摘要

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.