Figure 1 | Scientific Reports

Figure 1

From: Crystalline heterogeneity in single ferroelectric nanocrystals revealed by polarized nonlinear microscopy

Figure 1

(a) Principle of P-SHG measurement method, depicting the polarization angle α which rotates over [0°–180°]. (b) A SHG images stack is formed by raster scanning the sample for each α. The data are shown for a KTP nanocrystal of 150 nm size. Pixel size: 50 nm. (c) Calculated centroids (in white) for each image of a P-SHG stack. (d) SHG intensity as a function of α, in polar representation, here shown for the pixel in the center of (c). (e) P-SHG analysis results. The stick orientation represents the orientation φ2 obtained for each pixel, while its color is encoding the I2 value for this pixel. (f) Corresponding (I4, φ4) map for the same KTP nanocrystal, using similar representation for the stick orientation (φ4) and color (I4). Scale bars: 200 nm.

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