ONE-PHOTON AND 2-PHOTON SPECTROSCOPY OF CE3+ IONS IN LAF3-CEF3 MIXED-CRYSTALS

被引:97
作者
PEDRINI, C
MOINE, B
GACON, JC
JACQUIER, B
机构
[1] CNRS, Lyon i Univ., Villeurbanne
关键词
D O I
10.1088/0953-8984/4/24/016
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Absorption, excitation and emission spectra and lifetime measurements in cerium-doped lanthanum fluoride single crystals were obtained using both one- and two-photon spectroscopy techniques. It is shown that two kinds of fluorescent centres are present. In weakly doped systems, a rapid fluorescence around 300 nm dominates, due to Ce3+ ions at normal sites. In heavily doped systems, an additional longer fluorescence appears at higher wavelengths due to Ce3+ ions occupying perturbed sites and acting as traps. In CeF3, the energy migrates among Ce3+ ions and is finally trapped so that only the trap emission is detected at room temperature. Significant energy losses in the fluorescence of Ce3+ at normal sites are explained by up-conversion and ionization processes and by non-radiative surface recombination phenomena for the case of strong absorption. Two-photon excitation spectra in the region of trap absorption confirm the role of traps in emission mechanisms and show narrow lines which could be vibronic structures of various kinds of traps existing in these materials.
引用
收藏
页码:5461 / 5470
页数:10
相关论文
共 13 条
  • [1] PROPERTIES OF THE HIGH-DENSITY SCINTILLATOR CERIUM FLUORIDE
    ANDERSON, DF
    [J]. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 1989, 36 (01) : 137 - 140
  • [2] POWDER NEUTRON-DIFFRACTION STUDY OF LANTHANUM AND CERIUM TRIFLUORIDES
    CHEETHAM, AK
    FENDER, BEF
    FUESS, H
    WRIGHT, AF
    [J]. ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1976, 32 (JAN15): : 94 - 97
  • [3] DEXTER DL, 1958, SOLID STATE PHYS, V6, P353
  • [4] DIBARTOLO B, 1968, OPTICAL INTERACTIONS, P404
  • [5] OPTICALLY PUMPED CE-LAF3 LASER AT 286-NM
    EHRLICH, DJ
    MOULTON, PF
    OSGOOD, RM
    [J]. OPTICS LETTERS, 1980, 5 (08) : 339 - 341
  • [6] EXCITATION OF UV FLUORESCENCE IN LAF3 DOPED WITH TRIVALENT CERIUM AND PRASEODYMIUM
    ELIAS, LR
    HEAPS, WS
    YEN, WM
    [J]. PHYSICAL REVIEW B, 1973, 8 (11): : 4989 - 4995
  • [7] VACUUM ULTRAVIOLET ABSORPTION-BANDS OF TRIVALENT LANTHANIDES IN LAF3
    HEAPS, WS
    ELIAS, LR
    YEN, WM
    [J]. PHYSICAL REVIEW B, 1976, 13 (01): : 94 - 104
  • [8] LOH E, 1967, PHYS REV, V154, P270, DOI 10.1103/PhysRev.154.270
  • [9] MOSES WW, 1990, LBL29248 PREPR
  • [10] OPTICAL-PROPERTIES OF SINGLE-CRYSTALS OF SOME RARE-EARTH TRIFLUORIDES, 5-34-EV
    OLSON, CG
    PIACENTINI, M
    LYNCH, DW
    [J]. PHYSICAL REVIEW B, 1978, 18 (10): : 5740 - 5749