Third- and second-order optical nonlinearity of Ge-Ga-S-PbI{sub 2} chalcohalide glasses
- Key Laboratory of Silicate Materials Science and Engineering, Ministry of Education, Wuhan University of Technology, Wuhan, Hubei 430070 (China)
- State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871 (China)
Two series of metal iodide doped chalcohalide glasses (100-2x)GeS{sub 2}.xGa{sub 2}S{sub 3}.xPbI{sub 2} (0{<=}x{<=}20) and (100-x)(0.8GeS{sub 2}.0.2Ga{sub 2}S{sub 3}).xPbI{sub 2} (0{<=}x{<=}15) were prepared and characterized. The microstructure of these glasses has been studied by Raman scattering spectra. Utilizing femtosecond time-resolved optical Kerr effect (OKE) technique at the wavelength of 820 nm, a largest third-order nonlinearity {chi} {sup (3)} of 2.07x10{sup -13} esu was obtained for the 90GeS{sub 2}.5Ga{sub 2}S{sub 3}.5PbI{sub 2} glass, and it decreases with the addition of PbI{sub 2} in both two series. After thermally poled, second-harmonic generation (SHG) has been observed in these glasses according to Maker fringe method and a large second-order nonlinearity {chi} {sup (2)} as well as 4 pm/V was obtained for the 70GeS{sub 2}.15Ga{sub 2}S{sub 3}.15PbI{sub 2} glass. The variations of {chi} {sup (2)} and {chi} {sup (3)} on glass composition are ascribed to the evolution of micro-structural units in glass. These novel chalcohalide glasses would be expected to be the promising candidate materials for nonlinear optical devices. - Graphical abstract: Second-harmonic generation (SHG) has been observed from thermally poled Ge-Ga-S-PbI{sub 2} glasses by utilizing Maker fringe method. Ultrafast third-order nonlinear optical responses of these glasses have been measured by using femtosecond time-resolved optical Kerr effect (OKE) technique at the wavelength of 820 nm.
- OSTI ID:
- 21015643
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 180; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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