Far-infrared high-nonlinear Ge-Te-Se chalcogenide glass and preparation method thereof

Abstract

The invention discloses far-infrared high-nonlinear Ge-Te-Se chalcogenide glass. The far-infrared high-nonlinear Ge-Te-Se chalcogenide glass has a formula of Ge20TexSe(80-x) and in the formula, x represents a molar fraction and is in a range of 1-70. The Ge-Te-Se chalcogenide glass does not contain toxic As in the traditional chalcogenide glass and can be prepared through a simple and feasible method. Through use of eco-friendly Te in Ge-Te chalcogenide glass, the Ge-Te chalcogenide glass is optimized through high Te polarizability so that the obtained Ge-Te-Se chalcogenide glass has good permeability, a good glass formation capacity and a superhigh nonlinear refractive index. The far-infrared high-nonlinear Ge-Te-Se chalcogenide glass has a nonlinear refractive index n2 of 10<-17> to 10<-16>m<2>/W and the highest nonlinear refractive index of 2.2602*10<-16>m<2>/W. The far-infrared high-nonlinear Ge-Te-Se chalcogenide glass has a wide application range in a far-infrared area.

Description

technical field [0001] The invention relates to a chalcogenide glass, in particular to a Ge-Te-Se chalcogenide glass and a preparation method thereof. Background technique [0002] Chalcogenide glass is a material with a transmission range from near-infrared, mid-infrared (3-5 μm) to far-infrared region (8-20 μm), which has higher density, weaker bond strength, and high linear refractive index. , high nonlinear refractive index and ultra-fast response time (femtosecond to sub-picosecond level), and negligible two-phonon absorption in the communication band, are the best candidate materials for fast optical switching and optical signal regeneration. [0003] As 2 S 3 Glass was the first material used in all-optical converters in the form of optical fibers. In 1992, Asobe and others produced Aso with a length of 48cm 2 S 3 Single-mode fiber whose nonlinear refractive index n 2 up to 4.2×10 -18 m 2 / W, successfully demonstrated an all-optical switch with a switching pow...

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Problems solved by technology

In 2014, "Effect of Teon Linear and Non-linear Optical Properties of New Quaternary Ge-Se-Sb-TeChalcogenide Glasses" published by "Electron. Mater. Lett." in the United States compared the n of several mainstream Ge-Se-Sb chalcogenide glasses. 2 value, the n of these chalcogenide glasses 2 The value is basically 10 -18 ~10 -17 m 2 / W order of magnitude, so it also limits its application

[0005] CN104591540A patent discloses a Ge-Sn-Se chalcogenide glass, which is mixed with Sn element with low melting point and soft texture to reduce the glass hardness (especially the hardness above 161°C), but the nonlinearity of the chalcogenide glass is only It has been improved in a limited range, and its highest nonlinear refractive index only reaches 4.125×10 -17 m 2 / W(Ge 20 sn 5 Se 75 ), which cannot meet the demand for ultra-high nonlinearity in practical applications

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