AI Article Synopsis
- A theoretical prediction has been made for the existence of Dyakonov-Tamm waves at the interface of two dielectric materials, with one being anisotropic and periodically nonhomogeneous.
- A prism-coupled configuration was used experimentally to excite these waves between a magnesium fluoride thin film and a chiral zinc selenide thin film.
- The excitation was marked by a reflective dip that is unaffected by the incident light's polarization or the films' thickness beyond certain limits, with potential applications in optical sensing and long-range on-chip communication.
Article Abstract
A surface electromagnetic wave called the Dyakonov-Tamm wave has been theoretically predicted to exist at the interface of two dielectric materials at least one of which is both anisotropic and periodically nonhomogeneous. For experimental confirmation, a prism-coupled configuration was used to excite Dyakonov-Tamm waves guided by the interface of a dense thin film of magnesium fluoride and a chiral sculptured thin film of zinc selenide. The excitation was indicated by a reflection dip (with respect to the angle of incidence in the prism-coupled configuration) that is independent of the polarization state of the incident light as well as the thicknesses of both partnering materials beyond some thresholds. Applications to optical sensing and long-range on-chip communication are expected.
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| http://dx.doi.org/10.1103/PhysRevLett.111.243902 | DOI Listing |
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The Dyakonov-Tamm wave was experimentally excited along the periodically corrugated interface of magnesium fluoride as the isotropic homogeneous partnering material and a zinc-selenide chiral sculptured thin film (STF) as the anisotropic and periodically nonhomogeneous partnering material. The total transmittance of a p-polarized 633 nm laser beam was measured as a function of the angle of incidence for several thicknesses of the chiral STF to identify those dips in total transmittance that are indicative of the excitation of a Dyakonov-Tamm wave.
View Article and Find Full Text PDFObservation of the Dyakonov-Tamm wave.
Phys Rev Lett
December 2013
Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Article Synopsis
- A theoretical prediction has been made for the existence of Dyakonov-Tamm waves at the interface of two dielectric materials, with one being anisotropic and periodically nonhomogeneous.
- A prism-coupled configuration was used experimentally to excite these waves between a magnesium fluoride thin film and a chiral zinc selenide thin film.
- The excitation was marked by a reflective dip that is unaffected by the incident light's polarization or the films' thickness beyond certain limits, with potential applications in optical sensing and long-range on-chip communication.
Dyakonov-Tamm wave guided by a twist defect in a structurally chiral material.
J Opt Soc Am A Opt Image Sci Vis
July 2009
NanoMM, Nanoengineered Metamaterials Group, Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, PA 16802, USA.
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.
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