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arXiv · 1709.08722

Signatures of thermal hysteresis in Tamm-wave propagation

Francesco Chiadini·Vincenzo Fiumara·Tom G. Mackay·Antonio Scaglione·Akhlesh Lakhtakia
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Abstract

We numerically solved the boundary-value problem for Tamm waves (which may also be classified as Uller-Zenneck waves here) guided by the planar interface of a homogeneous isotropic dissipative dielectric (HIDD) material and a periodically multilayered isotropic dielectric material. The HIDD material was chosen to be VO${}_2$ which, at optical wavelengths, has a temperature-dependent refractive index with a hysteresis feature, i.e., the temperature-dependence of its refractive index varies depending upon whether the temperature is increasing or decreasing. A numerical code was implemented to extract solutions of the dispersion equation at a fixed wavelength for both $p$- and $s$-polarization states over the temperature range [50,80] degrees. A multitude of Tamm waves of both linear polarization states were found, demonstrating a clear demarcation of the heating and cooling phases in terms of wavenumbers and propagation distances. Thereby, the signatures of thermal hysteresis in Tamm-wave propagation were revealed.

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Francesco Chiadini, Vincenzo Fiumara, Tom G. Mackay, Antonio Scaglione, Akhlesh Lakhtakia. 2017-09-25. Signatures of thermal hysteresis in Tamm-wave propagation. https://doi.org/10.1364/josab.34.002155

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