...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review. B, Condensed Matter And Materials Physics >Spectroscopy of chromium centers in LiScGeO_4 and LiInGeO_4 single crystals
【24h】

Spectroscopy of chromium centers in LiScGeO_4 and LiInGeO_4 single crystals

机译：LiScGeO_4和LiInGeO_4单晶中铬中心的光谱

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The detailed spectroscopy of Cr:LiScGeO_4 and Cr:LiInGeO_4 is presented. Low temperature absorption, emission, and excitation spectroscopies reveal two types of optical centers: trivalent chromium in the distorted octahedral sites and tetravalent chromium in the tetrahedral sites. Energies of the transitions calculated from the exact atom positions using the angular overlap model are in a satisfactory agreement with the experimental data and describe the unusually low energy position of the Cr~(3+) metastable level. The spin-forbidden ~2E and T_1 transitions of Cr~(3+) appear as a Fano antiresonance in the absorption and excitation spectra. The temperature quenching of Cr~(3+) fluorescence is described in terms of the Struck and Fonger model. Cr~(3+) ions in highly distorted octahedral positions are active centers responsible for recently discovered Cr~(3+) laser action in the near-infrared range in these crystals.
机译：给出了Cr：LiScGeO_4和Cr：LiInGeO_4的详细光谱。低温吸收，发射和激发光谱学揭示了两种类型的光学中心：扭曲的八面体位点中的三价铬和四面体位点中的四价铬。使用角重叠模型从精确的原子位置计算出的跃迁的能量与实验数据令人满意，并描述了Cr〜（3+）亚稳能级的异常低能位置。 Cr〜（3+）的自旋禁止〜2E和T_1跃迁在吸收和激发光谱中表现为Fano反共振。利用Struck和Fonger模型描述了Cr〜（3+）荧光的温度猝灭。高度扭曲的八面体位置的Cr〜（3+）离子是活跃的中心，负责最近发现这些晶体中近红外范围内的Cr〜（3+）激光作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号