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Complex Refractive Index Determination of Bulk Materials from Infrared Reflection Spectra

Volume 49, Number 5 (May 1995) Page 639-644

Yamamoto, Kiyoshi; Masui, Akio


Kramers-Kronig analysis is applied to extract complex refractive indices of an isotropic single crystal, ceramics, glasses, and organic materials from their infrared external reflection spectra measured near the normal angle of incidence. It is demonstrated that this technique is versatile and can obtain complex refractive indices of materials. The great advantage of this technique is that a wide variety of materials (organic to inorganic, solid to liquid) can be analyzed and that no prior information is required for the analysis. The calculation procedure of the principal integration in Kramers-Kronig analysis of reflection spectra is also presented.