OPTICAL PROPERTIES OF ORTHORHOMBIC SULPHUR CRYSTALS IN VACUUM ULTRAVIOLET
OPTICAL PROPERTIES OF ORTHORHOMBIC SULPHUR CRYSTALS IN VACUUM ULTRAVIOLET
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DOI：
10.1016/0022-3697(69)90369-2
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发表时间：
1969-01-01
影响因子：
4
通讯作者：
SPEAR, WE
中科院分区：
文献类型：
--
作者：
COOK, BE;SPEAR, WE
在光子能量为2.5 ~ 14 eV范围内，测量了正交硫自然（111）面的正入射反射率。结果被认为是在很大程度上独立的表面处理。本文简要介绍了一种用于本工作的反射计。通过对实验数据的Kramers-Kronig分析，导出了正交晶系硫在上述能量范围内的光学常数。讨论了外推过程，并应用求和规则检验了结果的内部一致性。计算的吸收系数与吸收边附近的测量数据符合得很好。用Gibbons提出的实验能带模型解释了γ 2（ω）曲线的光谱特征，并取得了一定的成功。一般协议支持该模型，也是以前公布的解释电子传输机制在这种材料。
The normal incidence reflectivity of natural (111) faces of orthorhombic sulphur has been measured for photon energies between 2·5 and 14 eV. The results were found to be largely independent of the surface treatment. A reflectometer designed for the present work is briefly described. The optical constants of orthorhombic sulphur over the above energy range have been derived by a Kramers-Kronig analysis of the experimental data. The extrapolation procedure is discussed and the internal consistency of the results is tested by the application of sum rules. The computed absorption coefficient is in satisfactory agreement with the measured data near the absorption edge. The spectral features of theϵ2(ω) curve have been interpreted with some success in terms of the tentative band model suggested by Gibbons. The general agreement supports the model and also the previously published interpretation of the electronic transport mechanism in this material.