Determination of the optical constants of the γ-phase GdH3 thin films

被引：27

作者：

Lee, MW ^{[1
]}

Lin, CH ^{[1
]}

机构：

[1] Natl Chung Hsing Univ, Dept Phys, Taichung 402, Taiwan

来源：

JOURNAL OF APPLIED PHYSICS | 2000年 / 87卷 / 11期

关键词：

D O I：

10.1063/1.373457

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have measured the optical transmittance of thin films of gadolinium trihydride GdH3 over a broad spectral range, 0.05-6 eV. The analysis indicates that GdH3 is a wide-gap semiconductor with an energy gap of 2.55 eV. The fundamental absorption and impurity-related transitions dominate the spectra in the high-energy region, 1-6 eV. Hydrogen vibration modes dominate the spectra in the low-energy region, 0.05-0.2 eV. A strong free-carrier absorption effect is observed. In addition, the frequency-dependent refractive index, extinction coefficient, dielectric function, and optical conductivity are determined from the transmission spectra. This work also evaluates the plasma frequency associated with free carriers. (C) 2000 American Institute of Physics. [S0021-8979(00)08511-X].

引用

页码：7798 / 7801

页数：4

共 13 条

[1] HYDROGEN PAIRING AND ANISOTROPIC POTENTIAL FOR HYDROGEN ISOTOPES IN YTTRIUM [J].