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標題: Determination of the optical constants of the gamma-phase GdH3 thin films
作者: Lee, M.W.
Lin, C.H.
關鍵字: hydrides
期刊/報告no:: Journal of Applied Physics, Volume 87, Issue 11, Page(s) 7798-7801.
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].
ISSN: 0021-8979
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