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An unsettled discussion on the bounds of the geometric phase motivates us to explore its differences with the propagation phase. We prepare an experiment that allows us to modify both phases in the same setup and record the effect this has on white light interference fringes. Our results show clear differences between the phases where the propagation phase moves the white light interference pattern as a whole but the geometric phase does not. We present the addition of the geometric phase as we stack two retarders and compare it to the addition of the propagation phase obtained when stacking two glass windows.
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Luis Garza-Soto, Nathan Hagen, Dorilian Lopez-Mago, "Geometric phase vs propagation phase," Proc. SPIE 12690, Polarization Science and Remote Sensing XI, 1269009 (3 October 2023); https://doi.org/10.1117/12.2677232