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首页> 外文期刊>Physica, B. Condensed Matter >Composition dependence of optical band gap of the SeGeTe far infrared transmitting glasses
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Composition dependence of optical band gap of the SeGeTe far infrared transmitting glasses

机译：SeGeTe远红外透射眼镜的光学带隙的成分依赖性

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摘要

A systematic series of Se_xGe_(25-x)Te_(75) (x=0, 5, 10, 15, 20 at%) far infrared transmitting glasses were prepared by traditional melt-quenching method. Physical, thermal and optical properties of the glass system were analyzed. The allowed indirect transition of samples was calculated according to the classical Tauc equation. The results show the density increases with the substitution of Ge by Se and a maximum Τ_g value of 175 °C was obtained for the Se _(15)Ge_(10)Te_(75) glass. The energy band gap of Se_(15)Ge_(10)Te_(75) glass is 1.25 eV, possessing the largest metallization criterion value (0.25) and the lowest refractive index (3.16). When the dissolved amount of Se increased from 0 to 15 at%, the values of indirect optical band gap were in the range from 0.573 to 0.679 eV. A wide optical transparent window with a cut-off wavelength beyond 18 μm was shown.
机译：通过传统的熔融淬火方法制备了系统系列的Se_xGe_（25-x）Te_（75）（x = 0、5、10、15、20 at％）远红外透射玻璃。分析了玻璃系统的物理，热和光学性能。根据经典的Tauc方程计算样品的允许间接转变。结果表明，随着Se被Ge取代，密度增加，Se _（15）Ge_（10）Te_（75）玻璃的最大Τ_g值达到175°C。 Se_（15）Ge_（10）Te_（75）玻璃的能带隙为1.25 eV，具有最大的金属化标准值（0.25）和最低的折射率（3.16）。当Se的溶解量从0增加至15原子％时，间接光学带隙的值在0.573至0.679eV的范围内。显示了截止波长超过18μm的宽光学透明窗口。

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