Photoluminescence Kinetics of YAG Crystals Activated with Ce, and Ce and Mg |
| J. Barzowska, A. Kubicki, M. Grinberg Institute of Experimental Physics, Gdańsk University, 80-952 Gdańsk, Poland S. Kaczmarek Institute of Optoelectronics, Military University of Technology, 01-489 Warsaw Poland Z. Łuczyński Institute of Electronic Materials Technology, 01-919 Warsaw, Poland A.J. Wojtowicz and Cz. Koepke Institute of Physics, N. Copernicus University, 87-100 Toruń, Poland |
| Received: September 11, 1998; in final form January 29, 1999 |
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| A basic spectroscopic measurements of luminescence, absorption, luminescence excitation spectra and emission kinetic measurements on YAG crystals activated with cerium and magnesium are presented. We report that the Ce3+ luminescence decay constant, at 65 ns, is independent of Ce concentrations (from 0.05 to 0.2%) and that it does not change with the presence or absence of the Mg co-dopant. Nevertheless, we find that under pulsed laser excitation at 290 nm the rise time in Ce luminescence time profiles is effectively shorter in the Mg co-doped samples. |
| DOI: 10.12693/APhysPolA.95.395 PACS numbers: 71.55.-i, 78.47.+p, 78.55.-m |