REFRACTIVE-INDEX OF CRYSTALS FROM TRANSMISSION AND REFLECTION MEASUREMENTS - MGO IN THE FAR-INFRARED REGION

被引：25

作者：

CUNSOLO, S ^{[1
]}

DORE, P ^{[1
]}

VARSAMIS, CP ^{[1
]}

机构：

[1] UNIV SALERNO,DIPARTIMENTO FIS,I-84100 SALERNO,ITALY

来源：

APPLIED OPTICS | 1992年 / 31卷 / 22期

关键词：

REFRACTIVE INDEX; REFLECTANCE; TRANSMITTANCE; MGO; FAR INFRARED;

D O I：

10.1364/AO.31.004554

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In principle, the real n and imaginary k parts of the complex refractive index of a crystal can be determined by measuring, when possible, its transmission and reflection spectra. We show that it is possible to derive the frequency dependence of n and k in a simple way by using exact expressions for the interference-free transmittance and reflectance to describe low-resolution data. We also derive n and k data starting from one high-resolution spectrum. As an example, we have measured the room-temperature transmittance and reflectance of MgO in the far-infrared region. Reliable n and k data are then obtained in the frequency region 50-250 cm-1.

引用

页码：4554 / 4558

页数：5

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