Design and fabrication of a reflection far-ultraviolet polarizer and retarder

Physics

Scientific paper

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Scientific paper

New methods have been developed for the design of a far ultraviolet multilayer reflection polarizer and retarder. A MgF(subscript 2)/Al/MgF(subscript 2) three-layer structure deposited on a thick opaque Al film (substrate) is used for the design of polarizers and retarders. The induced transmission and absorption method is used for the design of a polarizer and layer-by-layer electric field calculation method is used for the design of a quarterwave retarder. In order to fabricate these designs in a conventional high vacuum chamber we have to minimize the oxidation of the Al layers and somehow characterize the oxidized layer. X-ray photoelectron spectroscopy is used to investigate the amount and profile of oxidation. Depth profiling results and a seven layer oxidation model are presented.

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