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標題: Optical properties of the gamma-phase yttrium trihydride YH3-delta
作者: Lee, M.W.
Shin, W.P.
關鍵字: lanthanum hydride films
rare-earth hydrides
期刊/報告no:: Journal of Applied Physics, Volume 86, Issue 12, Page(s) 6798-6802.
摘要: The transmission spectra of thin films of gamma-phase yttrium trihydride YHx, x congruent to 2.87, are measured in the energy range 0.05-6 eV at room temperature. The measured quantities are used to determine the frequency-dependent index of refraction, extinction coefficient, dielectric function, and optical conductivity. In the energy range (E = 0.2-6 eV), interband transition and impurity-related transitions dominate the optical properties. In the low-energy range (E = 0.05-0.2 eV), hydrogen vibration modes dominate the optical properties. In addition, strong absorption due to free carriers is observed. This work also evaluates several parameters such as plasma frequency, effective carrier density, and donor ionization energy. The possible sources for optical features observed in the spectra are also described. (C) 1999 American Institute of Physics. [S0021-8979(99)03224-7].
ISSN: 0021-8979
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