Optical Second Harmonic Generation Microscopy as a Tool of Material Diagnosis

Table 1

The relation of 𝑑 constants to the existences of spatial and magnetic inversion symmetries.

		Time reversal
			×
		○	Magnetic inversion
			○	×
Spatial inversion	○	𝑑^(𝑖)=0; 𝑑^(𝑐)=0	𝑑^(𝑖)=0; 𝑑^(𝑐)=0	𝑑^(𝑖)=0; 𝑑^(𝑐)=𝛽𝐹𝑚
	×	𝑑^(𝑖)=𝛼𝑃𝑠; 𝑑^(𝑐)=0	𝑑^(𝑖)=𝛼𝑃𝑠; 𝑑^(𝑐)=𝛾𝑃𝑠𝐹𝑚	𝑑^(𝑖)=𝛼𝑃𝑠; 𝑑^(𝑐)=𝛽𝐹𝑚+𝛾𝑃𝑠𝐹𝑚

○: the case of existence, ×: the case of absence.