The search for new non-centrosymmetric(NCS)crystals with wide energy-gaps(Eg)and strong secondharmonic generation(SHG)responses has become one of the greatest challenges in the mid-and farinfrared(MFIR)nonlinear optic...The search for new non-centrosymmetric(NCS)crystals with wide energy-gaps(Eg)and strong secondharmonic generation(SHG)responses has become one of the greatest challenges in the mid-and farinfrared(MFIR)nonlinear optical(NLO)field.In this work,a novel quaternary NCS material Sr_(5)ZnGa_(6)S_(15)(SZGS),which contains a complex 3D anionic framework and possesses the optical properties required for the MFIR NLO applications,especially the good balance between wide Eg(3.15 eV)and large SHG response(d_(ij)=1.2×AgGaS_(2)),has been discovered for the first time.Moreover,the result of theoretical calculation further indicates that the 3D[ZnGa_(6)S_(15)]^(10−)framework makes definitive contributions to the NLO properties.All these studies demonstrate that SZGS is a promising NLO candidate in the MFIR region.展开更多
基金supported by the National Natural Science Foundation of China(21771179,21571020 and 21301175)the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB20010200)the support from“Chunmiao Projects”of Haixi Institute of Chinese Academy of Sciences.
文摘The search for new non-centrosymmetric(NCS)crystals with wide energy-gaps(Eg)and strong secondharmonic generation(SHG)responses has become one of the greatest challenges in the mid-and farinfrared(MFIR)nonlinear optical(NLO)field.In this work,a novel quaternary NCS material Sr_(5)ZnGa_(6)S_(15)(SZGS),which contains a complex 3D anionic framework and possesses the optical properties required for the MFIR NLO applications,especially the good balance between wide Eg(3.15 eV)and large SHG response(d_(ij)=1.2×AgGaS_(2)),has been discovered for the first time.Moreover,the result of theoretical calculation further indicates that the 3D[ZnGa_(6)S_(15)]^(10−)framework makes definitive contributions to the NLO properties.All these studies demonstrate that SZGS is a promising NLO candidate in the MFIR region.
