Polaronic Enhancement of Second-Harmonic Generation in Lithium Niobate

Agnieszka L. Kozub, Arno Schindlmayr, Uwe Gerstmann +1

Density-functional theory within a Berry-phase formulation of the dynamical polarization is used to determine the second-order susceptibility ${\chi }^{(2)}$ of lithium niobate (LiNbO$_3…