摘要

We demonstrate applications of a novel setup which is used for measuring the relative phase difference between S and P polarization at an oblique incidence point in optically denser medium by analyzing the relative frequency shift of adjacent axial modes of S and P resonances of a monolithic folded Fabry-Perot cavity (MFC). The relative frequency shift of adjacent axial modes of S and P resonances of an MFC is around 1.030 GHz for a confocal MFC cavity and 0.3869 GHz for a parallel MFC cavity. The relative phase difference at a reflection point A in an optically denser medium is inferred to be around -167.4 degrees for a confocal cavity and -201.1 degrees for a parallel cavity. This scheme can be used to measure relative phase differences in optically denser media which are out of the measuring range of ellipsometry.

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