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通过选择激发SBN晶体中处于不同晶场位的Eu3+离子,得到5D0→7F1的时间分辨荧光光谱,确定了不等价晶场位的离子间的能量转移速率。荧光峰随激发波数的变化表明局部晶场的连续畸变。Eu3+ ions at different crystal-field sites in SBN crystal are selectively pumped. From the time-resolved fluorescence spectra of 5D0→7F1, the energy transfer rates between ions in non-equivalent sites are evaluated. The dependence of fluorescence peak-frequency on the excitation wavenumber indicates the continuous distortion of local crystal field.
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