Spectroscopic characterisation of LaAlO3 crystal doped with Er3+ ions

• Published in: Optical materials Vol. 29; no. 7; pp. 766 - 772
• Main Authors: Deren, P.J., Mahiou, R.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.03.2007; Elsevier Science
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Erbium; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Judd–Ofelt; LaAlO3; Laser materials; Optical materials; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Optics; Perovskite; Physics; Radiative and nonradiative transitions; 78.20.−e; Perovskite; Judd–Ofelt; LaAlO3; Radiative and nonradiative transitions; 42.70.Hj; 78.55; Erbium; Radiative transition; Ternary compounds; Luminescence; Doped materials; Judd-Ofelt theory; Laser materials; Czochralski method; Nonradiative transitions; Monocrystals; Stimulated emission; Emission spectra; Optical properties; Perovskite; LaAlO3; Oscillator strengths; Lanthanum aluminate; Optical materials; Absorption spectra; 42.70.Hj; 78.20.-e; 78.55; Judd-Ofelt; Erbium; Radiative and nonradiative transitions; Erbium additions; Crystal growth from melts
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2005.12.006

Optical properties of a LaAlO3 single crystal doped with erbium were examined. The crystal was grown by the Czochralski method; absorption and emission spectra were measured at room and at low temperature. Decay times of main luminescence transitions were measured at 297 and 10K. Judd–Ofelt analysis was applied to calculate the oscillator strengths, radiative transitions and branching ratios. The values of the omega parameters are: Ω2=0.962, Ω4=0.652, Ω6=0.352 (all Ωt values are in 10−20cm2). RMS deviation was found to be 16.5×10−8. Emission cross-sections of the 4I13/2→4I15/2 and 4S3/2→4I15/2 were calculated. The gain of the possible 4I13/2→4I15/2 stimulated emission was determined.