Polarization-dependend effects on phase-singularities in the vicinity of sub-lambda-structures

摘要

We present theoretical and experimental studies of the reflected field in the vicinity of sub λ-structures. Rigorous numerical calculations and measurements were performed to get high-precision information of certain object parameters which go beyond the limits of classical microscopy. We show that the polarization of the illumination plays a key role for the field distribution, which is reflected from the examined objects. Furthermore, we present a simplified model, which is able to qualitatively predict the behaviour of the phase singularities correctly.