Optical Second Harmonic Generation Microscopy as a Tool of Material Diagnosis

Figure 5

3D SHG interference images of a QPM devise of MgO-doped LiNbO₃. Dark regions indicate inverted domains. The number on the top of each figure means the section position measured from the top surface of the sample. The 𝑃_𝑠 direction is along the 𝑐 axis.

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