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The second-order nonlinear optical (NLO) tensor coefficients of KNdP4O12(KNP) are theoretically predicted from its crystal structural data, by using the chemical bond theory of complex crystals and the modified bond charge model. Linear and nonlinear optical contributions of each type of bond to the total linearity (χ) and nonlinearity (dij) of KNP are quantitatively determined. The structure–property relationship of KNP is systematically investigated, from the chemical bond viewpoint. Based on the discussion of its structural modifications, we point out that NLO properties of KNP can be improved effectively using the doping method. Theoretical predictions show KNP to be a promising self-frequency-doubling laser material.
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Xue et al. (1998) studied this question.
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