摘要
To find materials with larger second-order nonlinearity, the Ge-P-S chalcogenide glasses with various ratios of GeS2 : P2S5 were prepared by the melt-quenching method. The microstructure and optical properties of these glasses were characterized by XRD, Raman, Vis- NIR speetroscopy and Maker fringe technique. The second harmonic generation (SHG) was observed in the as-prepared chalcogenide glasses which was ascribed to the thermal stress gradient and/ or the rnicroanisotropic defects ( such as the lone-pair orbital or the valence alternative pairs ) prefer-orientation of the as-prepared glasses.
To find materials with larger second-order nonlinearity, the Ge-P-S chalcogenide glasses with various ratios of GeS2 : P2S5 were prepared by the melt-quenching method. The microstructure and optical properties of these glasses were characterized by XRD, Raman, Vis- NIR speetroscopy and Maker fringe technique. The second harmonic generation (SHG) was observed in the as-prepared chalcogenide glasses which was ascribed to the thermal stress gradient and/ or the rnicroanisotropic defects ( such as the lone-pair orbital or the valence alternative pairs ) prefer-orientation of the as-prepared glasses.
基金
FundedbytheNaturalScienceFoundationofChina(No.50125205),ProgramforChangjiangScholarsandInnovativeResearchTeaminUniversity(PCSIRT),MinistryofEducationandTranscenturyTrainingProgramFoundationfortheTalentsbytheMinistryofEducationofChinain2000