Synthesis and Characterization of CsSrCO3F–A Beryllium-Free New Deep-Ultraviolet Nonlinear Optical Material

A new noncentrosymmetric (NCS) material, namely CsSrCO3F, was synthesized through conventional solid state reactions. CsSrCO3F exhibits a 3-dimensional structure that is composed of the stacked layers of [Sr(CO3)]∞, and the coplanar alignment of [CO3] triangles. Each [Sr(CO3)]∞ layer is connected by infinite Sr–F–Sr chains. Powder second-harmonic generation (SHG) using the Kurtz–Perry technique shows that CsSrCO3F is type I phase-matchable, and the measured SHG coefficient was 1.2 times that of KH2PO4. The result from the UV-vis diffuse reflectance spectroscopy study of the powder samples indicated that the short-wavelength absorption edge was below 200 nm, suggesting that CsSrCO3F is a promising deep-UV nonlinear optical material.