Jian Tang

Mixed‐Valence Engineering in Ge 2+ Chalcogenides: Structural Modulation for Balanced Infrared Nonlinear Optics

ABSTRACT Resolving the intrinsic trade‐off between strong second‐harmonic generation (SHG) and a wide band gap remains a central challenge in infrared nonlinear optical (NLO) materials. Here, we report a mixed‐valence engineering strategy to realize a previously unexplored Ge 2+...