Figure 2
(a) Total SHG intensity image of a BTO nanocrystal of size ~200 nm (pixel size: 50 nm). (b) Corresponding P-SHG result showing I2 (as the stick color encoding), φ2 (as the stick orientation) per measured pixel. (c) P-SHG results showing (I4, φ4). (d) SEM image of this BTO nanocrystal. (e) P-SHG total intensity image of a 100 nm size BTO nanocrystal covered with oil. (f) Corresponding (I2, φ2) and (g) (I4, φ4) maps. (h) SEM image of a ~ 1000 nm size aggregate of BTO nanocrystals. (i) P-SHG total intensity image of this aggregate. (j) Corresponding (I2, φ2) and (k) (I4, φ4) maps. (l) Enlarged view of the highlighted area in (j). Scale bars: 1000 nm unless otherwise noted.
