Thermally tunable infrared metasurfaces

We report a computational and experimental study using tunable infrared (IR) metasurfaces to demonstrate amplitude modulation (59%) in reflectance mode. The tuning was achieved through the addition of an active material - germanium telluride (GeTe) - within the unit cell of the metasurface architect...

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Bibliographic Details
Published in2017 11th International Congress on Engineered Materials Platforms for Novel Wave Phenomena (Metamaterials) pp. 313 - 315
Main Authors Shrekenhamer, D., Kim, S. J., Currano, L. J., Ruppalt, L. B., Champlain, J. G., Miragliotta, J. A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.08.2017
Subjects
Absorption
Dielectrics
Gold
Metamaterials
Optical switches
Reflectivity
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Summary:We report a computational and experimental study using tunable infrared (IR) metasurfaces to demonstrate amplitude modulation (59%) in reflectance mode. The tuning was achieved through the addition of an active material - germanium telluride (GeTe) - within the unit cell of the metasurface architecture. An applied stimulus (temperature) is used to induce a dielectric change in the active material and subsequent variation in the absorption and reflection properties of the metasurface in the IR. Additionally, we explore the prospect of dynamic opto-thermal switching for the prospect of fast modulation.
DOI:10.1109/MetaMaterials.2017.8107795