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(a) SEM image showing grain distribution of BST (light) and MgO (dark). (b) EDS analysis of MgO and BST grains, showing negligible intermixing. Curve offset for clarity.
(Color online) (a) Schematic of SH-CSOM technique. (b), (c) SH-CSOM images acquired at depths 1.6 and below the surface. The bright regions correspond to areas with strong SH collected, and correspond to the BST grains, while the dark regions correspond to MgO. (d) Three-dimensional rendering of SH response of BST:MgO taken over an by by volume using confocal sectioning. Solid objects are BST while transparent regions are MgO.
(Color online) (a) Diagram of TR-CSOM experiment. (b), (c) TR-CSOM images of BST:MgO at two distinct time delays (b) and (c). (d) TR-CSOM curves, obtained at two locations indicated by square markers in (b) and (c), corresponding to two distinct BST grains. The temporal response indicates an out-of-phase relationship between the two grains. (e), (f) Spatial maps of the magnitude and phase of the TR-CSOM response.
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