Cs2ZnGe3Se8

Cs₂ZnGe₃Se₈ is a quaternary semiconductor compound combining cesium, zinc, germanium, and selenium in a layered crystal structure. This material is primarily of research interest for nonlinear optical and mid-infrared photonic applications, where its wide bandgap and strong second-harmonic generation properties make it a candidate for frequency conversion devices and IR detectors. While not yet widely deployed in production, materials in this compositional family are being explored as alternatives to conventional IR optics (like ZnSe or AgGaS₂) due to their potential for improved transparency in the mid-IR region and enhanced nonlinear coefficients.