Abstract

A quarter-wave layer (QWL) of high refractive index, which is deposited on a transparent prism of low refractive index, can be designed to split an incident p-polarized light beam at the Brewster angle (BA) of the air–substrate interface into p-polarized reflected and transmitted beams of equal intensity (50% each) that travel in orthogonal directions. For reflection of p-polarized light at the BA, the supported QWL functions as a free-standing (unsupported) pellicle. An exemplary design is presented that uses SixGe1x QWL deposited on an IRTRAN1 prism for applications (such as Michelson and Mach–Zehnder interferometry) with a variable compositional fraction x in the 2–6 μm mid-IR spectral range.

© 2017 Optical Society of America

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