Artificial polarization components

L. Cescato; Ekkehard Gluch; Wilhelm Stork; Norbert Streibl

doi:10.1117/12.22213

1 July 1990 Artificial polarization components

L. Cescato, Ekkehard Gluch, Wilhelm Stork, Norbert Streibl

Proceedings Volume 1319, Optics in Complex Systems; (1990) https://doi.org/10.1117/12.22213
Event: 15th International Optics in Complex Systems, 1990, Garmisch, Germany

Abstract

High frequency surface relief structures are optically anisotropic and show interesting polarisation properties 1 . These properties can be used to produce polarizations components such as wave plates polarizers. polarizing beamsplitters etc. Our experimental results show that even gratings with relatively low spatial frequency ( periods A ) exhibit a strong phase retardation and can be used as quarter-wave plates. k INTRODUC11ON The artificial birefringence exhibited by ultrahigh frequency gratings of dielectric materials can be used to produce various polarization components2 . Such components have applications in integrated optics as well as in free space optics. In order to produce the high spatial frequencies complex processes such as electron-beam lithography and reactive ion etching are needed. We show in this paper that sinusoidal holographic gratings in photoresist exhibit also a strong phase ret even at relatively long periods. L EXPERIMENTAL MEASUREMENTS To obtain the phase retardation of a lower frequency ( period A ) grating a simple setup as used by Enger and 2 can be applied. In our case however there are three measurements necessary to obtain the phase retardation because transmission of the two perpendicularly polarized beams is different from each other. I GRATING PRODUCTION grating 2 3 4 5 6 7 8 9 period (pmj 0. 74 0. 74 0. 61 0. 54 0. 46 0. 32 0. 54 0. 54 0. 54 ne (sec) 60

Citation Download Citation

L. Cescato, Ekkehard Gluch, Wilhelm Stork, and Norbert Streibl "Artificial polarization components", Proc. SPIE 1319, Optics in Complex Systems, (1 July 1990); https://doi.org/10.1117/12.22213

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