From CuFeS2, the introduction of Ge leads to an increase in band gap. The ordered arrangement of NLO active units [GeS4] results in a strong SHG response. Finally, Ba6Cu2FeGe4S16 exhibits good NLO performance (SHG, 1.5 × AgGaSe2; LDT, 2 × AgGaSe2).
Two-dimensional (2D) nonlinear optical monolayers are brilliant candidates for future nanoscale laser devices, typically within the deep ultraviolet(DUV) region. In our work, we propose a material template-optimized design strategy to...