Fig. 2: Experimental results.
From: Ultra-sensitive measurement of transverse displacements with linear photonic gears
a For each value of Λ, we reported the normalized measured power of the horizontal polarization component, as a function of the displacement between the two g-plates. The zero displacement point for each curve has been set to allow easy visual comparison between different gears. b The same measurement is repeated in the linear part of the calibration curves, with a displacement step of 20 nm. For each configuration, the input optical power was set to a reference value P0 = 1 mW. In both panels, points represent experimental data, solid lines are best-fit curves according to equations in the main text, experimental points correspond to the average power over 20 independent measurements (error bars, corresponding to standard deviations, are smaller than the data point size). Specific colors label datasets that are associated with different spatial periods Λ (expressed in μm in the legend).
