Dyakonov-Tamm waves guided by a phase-twist combination defect in a sculptured nematic thin film

Muhammad Faryad; Akhlesh Lakhtakia

doi:10.1016/j.optcom.2010.08.042

Dyakonov-Tamm waves guided by a phase-twist combination defect in a sculptured nematic thin film

Muhammad Faryad, Akhlesh Lakhtakia

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Abstract

The propagation of Dyakonov-Tamm waves guided by a phase-twist combination defect in a sculptured nematic thin film (SNTF) was studied theoretically by numerical solution of a dispersion equation. The phase defect was fixed at 180°, whereas the twist defect was kept variable as also the direction of propagation. Multiple Dyakonov-Tamm waves that differ in spatial profile, degree of localization, and phase speed were found to propagate guided by the combination defect, depending on the angle between the morphologically significant planes of the SNTF on either side of the defect as well as on the direction of propagation. The most strongly localized Dyakonov-Tamm waves turned out to be essentially confined within one structural period of the SNTF normal to the combination defect.

Original language	English (US)
Pages (from-to)	160-168
Number of pages	9
Journal	Optics Communications
Volume	284
Issue number	1
DOIs	https://doi.org/10.1016/j.optcom.2010.08.042
State	Published - Jan 1 2011

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

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10.1016/j.optcom.2010.08.042

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title = "Dyakonov-Tamm waves guided by a phase-twist combination defect in a sculptured nematic thin film",

abstract = "The propagation of Dyakonov-Tamm waves guided by a phase-twist combination defect in a sculptured nematic thin film (SNTF) was studied theoretically by numerical solution of a dispersion equation. The phase defect was fixed at 180°, whereas the twist defect was kept variable as also the direction of propagation. Multiple Dyakonov-Tamm waves that differ in spatial profile, degree of localization, and phase speed were found to propagate guided by the combination defect, depending on the angle between the morphologically significant planes of the SNTF on either side of the defect as well as on the direction of propagation. The most strongly localized Dyakonov-Tamm waves turned out to be essentially confined within one structural period of the SNTF normal to the combination defect.",

author = "Muhammad Faryad and Akhlesh Lakhtakia",

note = "Funding Information: We are grateful to the Charles Godfrey Binder Endowment at the Pennsylvania State University for partial financial support of this work.",

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AU - Faryad, Muhammad

AU - Lakhtakia, Akhlesh

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AB - The propagation of Dyakonov-Tamm waves guided by a phase-twist combination defect in a sculptured nematic thin film (SNTF) was studied theoretically by numerical solution of a dispersion equation. The phase defect was fixed at 180°, whereas the twist defect was kept variable as also the direction of propagation. Multiple Dyakonov-Tamm waves that differ in spatial profile, degree of localization, and phase speed were found to propagate guided by the combination defect, depending on the angle between the morphologically significant planes of the SNTF on either side of the defect as well as on the direction of propagation. The most strongly localized Dyakonov-Tamm waves turned out to be essentially confined within one structural period of the SNTF normal to the combination defect.

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Dyakonov-Tamm waves guided by a phase-twist combination defect in a sculptured nematic thin film

Abstract

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