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首页> 外文期刊>Materials Chemistry and Physics >Rare-earth doping, various post-growth heat treatments and aging effects on OH~- absorption in LiNbO_3 crystal
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Rare-earth doping, various post-growth heat treatments and aging effects on OH~- absorption in LiNbO_3 crystal

机译：稀土掺杂，各种生长后热处理以及时效对LiNbO_3晶体中OH〜-吸收的影响

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摘要

Rare-earth-doping and various post-growth heat treatments effects on OH absorption in singly Er- and Yb-doped, doubly Er/Mg- and Er/Yb-doped LiNbO_3 crystals have been investigated. The OH~- absorption in the rare-earth-doped crystals shows definite anisotropy and is stronger in a Z-cut plate. Rare-earth-doping causes considerable OH~- absorption reduction. MgO-codoping induces additional reduction. Slight/heavy rare-earth-doping causes slight/considerable spectral shape change. Thermal reduction treatment causes OH~- absorption vanishing whether the crystal is originally congruent or near-stoichiometric. Further oxidation treatment renders the absorption reemerged. Li-rich vapor transport equilibration (VTE) treatment causes significant absorption decrease. For a slightly rare-earth-doped Li-rich VTE-treated crystal, its spectral feature is similar to that of the undoped near-stoichiometric crystal; for a heavily rare-earth-doped VTE-treated crystal, its spectral shape preserves the feature of the heavily rare-earth-doped as-grown crystal. For the Er/Mg-codoped crystal studied, the Li-rich VTE also induces an abrupt conversion of peaking position from 3483 cm~(-1) to 3535 cm~(-1). The absorption in the Li-rich VTE-treated crystals also reveals aging effects in spectral shape, peaking position and absorption intensity. Li-poor VTE induces significant absorption increase. In addition, the effect of OH~- presence on lifetime of Er~(3+) emission at 1.5 urn was also studied. The results show that the effect is small for the as-grown congruent crystals and slight for Li-rich VTE-treated ones.
机译：研究了稀土掺杂和各种生长后热处理对单一掺Er和Yb掺杂，双重Er / Mg和Er / Yb掺杂的LiNbO_3晶体中OH吸收的影响。稀土掺杂晶体中的OH〜-吸收表现出一定的各向异性，并且在Z形切割板中更强。稀土掺杂会大大降低OH〜-的吸收。掺MgO引起额外的还原。轻/重稀土掺杂会导致光谱形状发生轻微/相当大的变化。无论晶体最初是全同的还是接近化学计量的，热还原处理都会导致OH〜-吸收消失。进一步的氧化处理使吸收重新出现。富锂蒸气传输平衡（VTE）处理会导致吸收率显着下降。对于轻度掺杂稀土元素的富锂VTE处理的晶体，其光谱特征类似于未掺杂的近化学计量晶体。对于重稀土掺杂的VTE处理的晶体，其光谱形状保留了重稀土掺杂成晶体的特征。对于所研究的掺Er / Mg的晶体，富含Li的VTE也引起峰位置从3483 cm〜（-1）突然转变为3535 cm〜（-1）。富锂VTE处理的晶体中的吸收也显示出光谱形状，峰位置和吸收强度的老化效应。贫锂VTE导致吸收率显着增加。此外，还研究了OH〜-的存在对1.5 urn下Er〜（3+）发射寿命的影响。结果表明，对于刚生长的全同晶体，该影响很小，而对于富锂VTE处理的晶体，该影响很小。

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  • 来源
    《Materials Chemistry and Physics》 |2012年第3期|416-424|共9页
  • 作者

    De-Long Zhang; Wen-Zhu Zhang; Jian Gao; Ping-Rang Hua; Bei Chen; Edwin Yue-Bun Pun;

  • 作者单位

    Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, PR China,Key Laboratory of Optoelectronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, PR China,Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, PR China;

    Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, PR China,Key Laboratory of Optoelectronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, PR China;

    Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, PR China,Key Laboratory of Optoelectronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, PR China;

    Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, PR China,Key Laboratory of Optoelectronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, PR China,Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, PR China;

    Department of Opto-electronics and Information Engineering, School of Precision Instruments and Opto-electronics Engineering, Tianjin University, Tianjin 300072, PR China,Key Laboratory of Optoelectronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, PR China,Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, PR China;

    Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, PR China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    rare-earth-doped LN crystal; OH~- absorption; Li-rich/Li-poor VTE; aging effect; thermal reduction; oxidation; optical materials; heat treatment; infrared spectroscopy (IR); phonons; defects;

    机译：稀土掺杂的LN晶体;OH〜-吸收;富锂/贫锂VTE;老化效果热还原氧化光学材料热处理;红外光谱（IR）声子缺陷;

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