Investigation of the third-order nonlinear property of Ge–Se–Te glasses at mid-infrared
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- 作者：Lihong Sun ; Feifei Chen ; Yinsheng Xu ; Yicong Huang ; Shuo Liu…
- 刊名：Applied Physics A: Materials Science & Processing
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：122
- 期：9
- 全文大小：835 KB
- 刊物类别：Physics and Astronomy
- 刊物主题：Physics
Condensed Matter
Optical and Electronic Materials
Nanotechnology
Characterization and Evaluation Materials
Surfaces and Interfaces and Thin Films
Operating Procedures and Materials Treatment - 出版者：Springer Berlin / Heidelberg
- ISSN：1432-0630
- 卷排序：122
文摘
In this study, a series of Ge20TexSe(80−x) (x = 0, 5, 10, 20, 30, 60, 70) chalcogenide glasses were prepared using conventional melt-quenching technique. Through absorption spectra analysis, the optical Tauc gaps were derived in detail along the increase in the Te content which can be supported by structural changing of glass network shown by Raman spectra. The third-order optical nonlinearity of the glasses at mid-infrared wavelength of 3.1 μm was investigated by traditional Z-scan method. The nonlinear refractive index of the glasses increased with the increase in the Te content, typically the measured nonlinear refractive index of Ge20Se50Te30 glass increased to 8.2 ± 1.2 × 10−18 m2/W. The relationship between the nonlinear refractive index and the optical band gap was analyzed.
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