Quantum Point Defects for Solid‐State Laser Refrigeration
Quantum Point Defects for Solid‐State Laser Refrigeration
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DOI：
10.1002/adma.201905406
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发表时间：
2020-07
影响因子：
29.4
通讯作者：
Xiaojing Xia;Anupum Pant;Abbie S. Ganas;F. Jelezko;P. Pauzauskie
中科院分区：
文献类型：
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作者：
Xiaojing Xia;Anupum Pant;Abbie S. Ganas;F. Jelezko;P. Pauzauskie
本文讨论了点缺陷在过去二十年中在实现固态激光制冷方面所发挥的作用。简要介绍了固态激光制冷领域，重点介绍了使固态激光冷却成为可能的基本物理现象和量子化电子跃迁。三价镱离子 (Yb3+) 等基于镧系元素的点缺陷在固态激光制冷先进材料的首次演示和后续开发中发挥了核心作用。重要的讨论致力于镧系离子光学跃迁的量子力学描述及其对激光冷却的影响。过渡金属点缺陷已被证明会在陶瓷材料中产生大量背景吸收，从而降低特定激光制冷材料的整体效率。还考虑了基于具有多个潜在电荷状态的氟化物空位的其他潜在色心。总之，讨论了用于固态激光制冷的新型材料，包括最近提出的用于实现半导体材料固态激光制冷的金刚石色心。
Herein, the role that point defects have played over the last two decades in realizing solid‐state laser refrigeration is discussed. A brief introduction to the field of solid‐state laser refrigeration is given with an emphasis on the fundamental physical phenomena and quantized electronic transitions that have made solid‐state laser‐cooling possible. Lanthanide‐based point defects, such as trivalent ytterbium ions (Yb3+), have played a central role in the first demonstrations and subsequent development of advanced materials for solid‐state laser refrigeration. Significant discussion is devoted to the quantum mechanical description of optical transitions in lanthanide ions, and their influence on laser cooling. Transition‐metal point defects have been shown to generate substantial background absorption in ceramic materials, decreasing the overall efficiency of a particular laser refrigeration material. Other potential color centers based on fluoride vacancies with multiple potential charge states are also considered. In conclusion, novel materials for solid‐state laser refrigeration, including color centers in diamond that have recently been proposed to realize the solid‐state laser refrigeration of semiconducting materials, are discussed.