Synthesis and characterization of CsSrCO3F – a beryllium-free new deep-ultraviolet nonlinear optical material

Abstract

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.