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Analysis of Wire-Grid Polarisers in Terahertz Spectral Range

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Polarisers are important components in many optical applications working with polarised radiation, therefore it is need to know their behaviour at specified spectral range. Interest in terahertz (THz) radiation and its application in science, where we need polarisers was our motivation for study of commonly used polarisers this spectral range. In our paper we present THz measurement of free standing wire-grid (5 μm tungsten wire, 12.5 μm period) and polyethylene foil wire-grid (0.5 μm metallic stripes, 1.2 μm period) polariser. Measurements were performed by terahertz time domain spectroscopy in the range from 60 GHz to 3 THz (2–100 cm−1) at different rotation of azimuth angle. For quality evaluation was from measured data calculated extinction ratio and phase shift. Both polarisers were compared and their suitability for THz application is discussed. Results show better properties of free standing wire-grid polariser in the range up to 60 cm−1 while properties of polyethylene polariser are better at higher wavenumbers. Polarisers are described in the frame of Jones matrix calculus.
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Keywords: Jones Calculus; Terahertz Spectroscopy; Wire-Grid Polariser

Document Type: Research Article

Affiliations: 1: Nanotechnology Center, VŠB - Technical University of Ostrava, 17. Listopadu 15, 708 33 Ostrava–Poruba, Czech Republic 2: IT4Innovations, VŠB - Technical University of Ostrava, 17. Listopadu 15, 708 33 Ostrava–Poruba, Czech Republic 3: Institut d’Electronique, Microélectronique et Nanotechnologie, CNRS UMR 8520 Avenue Poincaré BP 60069, 59652 Villeneuve d’Ascq CEDEX, France

Publication date: 2016-08-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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