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Broadband iridium wire grid polarizer for UV applications

: Weber, T.; Käsebier, T.; Kley, E.-B.; Tünnermann, A.


Optics Letters 36 (2011), No.4, pp.445-447
ISSN: 0146-9592
Journal Article
Fraunhofer IOF ()

In this Letter, we present an iridium wire grid polarizer with a large spectral working range from IR down to the UV spectral region. The required grating period of 100nm for an application below a wavelength of 300nm was realized using a spatial frequency doubling technique based on ultrafast electron beam writing. The optical performance of the polarizer at a wavelength of 300nm is a transmittance of almost 60% and an extinction ratio of about 30 (15dB). Furthermore, the oxidation resistance is discussed.