Abstract
We present a common-path surface plasmon interferometer with radial polarization. We show how the effect, the output of the microscope versus defocus , can be derived utilizing a radially polarized illumination and a virtual annulus. The measurement of the effect gives a strong signature of the surface plasmon propagation, which is functionally related to the material properties. We discuss the advantages of using radial polarization compared to linear polarization.
© 2018 Optical Society of America
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