The linear and second-order nonlinear optical properties of single-crystal zinc tris(thiourea) sulfate, or ZTS, are determined. The deduced nonlinear coefficients are |d31| = 0.31, |d32| = 0.35, and |d33| = 0.23 pm/V compared with a |d14| value of 0.39 pm/V for potassium dihydrogen phosphate. Because it exhibits a low angular sensitivity (δΔk/δθ), ZTS may prove useful for type-II second-harmonic generation from 1.06 to 1.027 µm. We present the phase-matching measurement data for ZTS and compare the calculated frequency conversion efficiency for ZTS with that of several other well-characterized materials.
© 1992 Optical Society of America
H. O. Marcy, L. F. Warren, M. S. Webb, C. A. Ebbers, S. P. Velsko, G. C. Kennedy, and G. C. Catella, "Second-harmonic generation in zinc tris(thiourea) sulfate," Appl. Opt. 31, 5051-5060 (1992)