Iridium wire grid polarizer fabricated using atomic layer deposition |
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Authors: | Thomas Weber Thomas K?sebier Adriana Szeghalmi Mato Knez Ernst-Bernhard Kley Andreas Tünnermann |
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Affiliation: | 1.Friedrich-Schiller-University Jena, Institute of Applied Physics, Max-Wien-Platz 1, 07749 Jena, Germany;2.Max-Planck-Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany;3.Fraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein-Straße 7, 07745 Jena, Germany |
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Abstract: | In this work, an effective multistep process toward fabrication of an iridium wire grid polarizer for UV applications involving a frequency doubling process based on ultrafast electron beam lithography and atomic layer deposition is presented. The choice of iridium as grating material is based on its good optical properties and a superior oxidation resistance. Furthermore, atomic layer deposition of iridium allows a precise adjustment of the structural parameters of the grating much better than other deposition techniques like sputtering for example. At the target wavelength of 250 nm, a transmission of about 45% and an extinction ratio of 87 are achieved. |
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Keywords: | optics nanostructure fabrication polarizing devices |
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