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26 February 2020 Biaxial hyperbolic metamaterials
Changkee Hong, Azad Siahmakoun, Hossein Alisafaee
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Proceedings Volume 11289, Photonic and Phononic Properties of Engineered Nanostructures X; 1128929 (2020) https://doi.org/10.1117/12.2546919
Event: SPIE OPTO, 2020, San Francisco, California, United States
Abstract
We have fabricated biaxial hyperbolic metamaterials (BHMMs) using layered structures consisting of titanium dioxide (TiO2) and copper (Cu). In order to enable the biaxial property, an oblique angle deposition (OAD) technique is applied to deposit the dielectric layer. We have characterized the biaxial hyperbolic dispersion using variable angle spectroscopic ellipsometry (VASE) measurements in the wavelength range 400 nm to 900 nm. A noticeable difference be- tween in-plane permittivity components of the fabricated BHMM is observed to be 0.13 at 633 nm. The experimental characterization results have been in good agreement with the predictions of effective medium approximation (EMA) with an MSE of 18.
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Changkee Hong, Azad Siahmakoun, and Hossein Alisafaee "Biaxial hyperbolic metamaterials", Proc. SPIE 11289, Photonic and Phononic Properties of Engineered Nanostructures X, 1128929 (26 February 2020); https://doi.org/10.1117/12.2546919
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KEYWORDS
Metamaterials
Spectroscopic ellipsometry
Birefringence
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