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首页> 外文期刊>Materials Chemistry and Physics >Optical characterization of xTiO_2-(60-x)SiO_2-40Na_2O glasses I. Linear and nonlinear dispersion properties
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Optical characterization of xTiO_2-(60-x)SiO_2-40Na_2O glasses I. Linear and nonlinear dispersion properties

机译：xTiO_2-（60-x）SiO_2-40Na_2O玻璃的光学表征I.线性和非线性色散特性

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摘要

Different xTiO_2-(60 - x)SiO_2-40Na_2O (5 ≤ x ≤ 20 wt.%) glasses are prepared in the form of plane parallel slabs. The optical constants of these optical glasses are determined over a wide spectral range, 0.2-3 μm, providing the complex dielectric constant to be calculated. The different dispersion parameters of the studied compositions are determined as well. Higher values for the refractive index and dispersion are recorded due to the high polarizability of Ti and the low preference of 4-coordination for titanium. The wavelength for zero material dispersion is evaluated. The second-order index of refraction and the third-order nonlinear optical susceptibility are computed from the measured linear refractive index data. These nonlinear properties of the present glass show one order of magnitude enhancement over some TiO_2 silicate glasses. The measured mid-IR-spectra of the different glasses are carried out to investigate the structure of the present glasses. It has been found that, the addition of titanium (i.e., highly polarizable element) not only acts as glass modifier but also behaves as intermediate and Ti~(4+) exalts more the measured glass parameters.
机译：以平面平行平板的形式制备不同的xTiO_2-（60-x）SiO_2-40Na_2O（5≤x≤20wt。％）玻璃。这些光学玻璃的光学常数在0.2-3μm的宽光谱范围内确定，从而提供了要计算的复数介电常数。还确定了所研究组合物的不同分散参数。由于Ti的高极化率和钛的4配位偏低，因此记录到较高的折射率和色散值。评估零材料色散的波长。根据测得的线性折射率数据计算出二阶折射率和三阶非线性光学磁化率。与某些TiO_2硅酸盐玻璃相比，本发明玻璃的这些非线性特性显示出一个数量级的增强。测量不同眼镜的中红外光谱以研究本眼镜的结构。已经发现，添加钛（即，高度可极化的元素）不仅充当玻璃改性剂，而且充当中间体，并且Ti〜（4+）提高了所测量的玻璃参数。

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