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arXiv · 1601.07022

Extended Malus' Law with THz metallic metamaterials for sensitive detection with giant tunable quality factor

Xavier Romain·Fadi Baida·Philippe Boyer
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Abstract

We study a polarizer-analyzer mounting for the terahertz regime with perfectly conducting metallic polarizers made of a periodic subwavelength pattern. We analytically investigate the influence on the transmission response of the multiple reflections which occur between polarizer and analyzer with a renewed Jones formalism. We demonstrate that this interaction leads to a modified transmission response: the extended Malus' Law. In addition, we show that the transmission response can be controlled by the distance between polarizer and analyzer. For particular set-ups, the mounting exhibits extremely sensitive transmission responses. This interesting feature can be employed for high precision sensing and characterization applications. We specifically propose a general design for measuring electro-optical response of materials in the terahertz domain allowing detection of refractive index variations as small as $10^{-5}$.

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Xavier Romain, Fadi Baida, Philippe Boyer. 2016-01-26. Extended Malus' Law with THz metallic metamaterials for sensitive detection with giant tunable quality factor. https://doi.org/10.1103/physrevb.94.045407

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