Phase Angle and Effective Second-Harmonic Generation Coefficient in Uniaxial Crystal
arXiv:2607.12851
The paper derives formulas for the optimal phase and azimuth angles that maximize the effective second‑harmonic generation (SHG) coefficients in uniaxial crystals, using optimization theory and only the principal components of the second‑order susceptibility tensor.
Abstract
In this paper, the calculation formulae of phase angle are given for two classes of largest effective SHG coefficients in uniaxial crystals by means of the optimization theory. With the help of such calculation formulae, we present the best phase angles and azimuth angles of all uniaxial crystals class, as well as their effective SHG coefficients. Furthermore, these calculation is only dependent upon some principal subtensor of second order susceptibility tensor.
25 Pages