掺杂氟化钠晶体色心的零声子跃迁和光谱烧孔(英文)

Zero-phonon Transitions and Spectral Hole Burning of Color Centers in Doped Sodium Fluoride Crystals

在 10～ 77K测量温度范围内 ,从室温伽马辐照着色的掺羟NaF晶体中观察到R2 和N-带零声子线 (ZPLs)。用普通分光光度计的光在 10K下能将N-ZPLs完全漂白。用其更窄带的光在 10K能在此线的吸收光谱上烧出 1个明显的孔。在适当温度下 ,用紫外光照射能将此线的光漂白几乎全部恢复。在不同温度下 ,研究了未掺杂NaF晶体 82 1nmZPL光谱特性随温度的变化关系 ,并估算出对应的Huang Rhys因子约为 2 .4 9。

Zero-phonon lines(ZPLs)associated with R_2 and N^- bands were observed in hydroxyl-doped sodium fluoride crystals irradiated by gamma rays at room temperature in the measured temperature range of 10-77 K.The N^- ZPL can be nearly completely bleached using normal spectrophotometer light at 10 K.An obvious spectral burning hole in absorption profile of the ZPL of the N^- color centers in the colored doped sodium fluoride crystals was obtained using the spectrophotometer light adjusted to narrower bandwidth at 10 K.Ultraviolet light radiation can mostly recovered the optical bleaching of the ZPL at proper temperature.Temperature dependence of spectral properties of 821 nm ZPL in the colored undoped sodium fluoride crystals were investigated at different temperatures.Value of Huang-Rhys factor of 2.49 was approximately estimated for transition of the color centers with 821 nm ZPL in the colored undoped sodium fluoride crystals.