title: [Anisotropic absorption spectra in YAlO3: (Nd3+ and Lu3+) single crystal].
abstract: Absorption spectra of YAlO3: (Nd3+, Lu3+) single crystals for the three crystallographic axes were investigated at room temperature. The absorption band intensities distinctly revealed the anisotropy of YAlO3: (Nd3+, Lu3+). The Judd-Ofelt theory was modified and applied to the treatment of the anisotropic absorption spectra. The absorption cross sections and the electric dipole oscillator strengths of various bands were calculated for three crystallographic axes of YAlO3: (Nd3+, Lu3+) crystals. Three sets of phenomenological parameters omegat(alpha) were determined. The validity of the modified Judd-Ofelt approach is discussed in detail. Moreover, we explained the anisotropy of the optical absorption of YAlO3: (Nd3+, Lu3+).
authors.affiliation: Laboratory of Semiconductor Material Science, Institute of Semiconductors, Chinese Academy of Sciences 100083 Beijing.
authors.forename: X
authors.initials: X
authors.lastname: Zhang
authors.forename: B
authors.initials: B
authors.lastname: Jiang
authors.forename: J
authors.initials: J
authors.lastname: Xu
authors.forename: X
authors.initials: X
authors.lastname: Lin
authors.forename: Z
authors.initials: Z
authors.lastname: Wang