Germanium–vacancy color center in isotopically enriched diamonds synthesized at high pressures

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• 作者：E. A. Ekimov ; S. G. Lyapin ; K. N. Boldyrev ; M. V. Kondrin ; R. Khmelnitskiy…
• 刊名：JETP Letters
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：102
• 期：11
• 页码：701-706
• 全文大小：663 KB
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• 作者单位：E. A. Ekimov (1)
  S. G. Lyapin (1)
  K. N. Boldyrev (2)
  M. V. Kondrin (1)
  R. Khmelnitskiy (3)
  V. A. Gavva (4)
  T. V. Kotereva (4)
  M. N. Popova (2)
  
  1. Institute for High Pressure Physics, Russian Academy of Sciences, Troitsk, 142190, Russia
  2. Institute of Spectroscopy, Russian Academy of Sciences, Troitsk, 142190, Russia
  3. Lebedev Physical Institute, Russian Academy of Sciences, Moscow, Russia
  4. Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, Nizhny Novgorod, 6039950, Russia
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Elementary Particles and Nuclei
  Atoms, Molecules, Clusters and Plasmas
  Solid State Physics and Spectroscopy
  Russian Library of Science
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1090-6487

文摘

We report on the high-pressure synthesis of novel nano- and microcrystalline diamonds with germanium–vacancy (Ge–V) color centers emitting at 602 nm. The synthesis was carried out in non-metallic growth systems C–H–Ge and C–H–O–Ge enriched with germanium and carbon isotopes. We demonstrate germanium and carbon isotope shifts in the fine structure of the luminescence, which allows us to unambiguously associate the center with the germanium impurity entering into the diamond lattice. We show that there are two ground-state energy levels with the separation of 0.7 meV and two excited-state levels separated by 4.6 meV in the electronic structure of the center and suggest a split-vacancy structure of this center. High-intensity and narrow-line emission of high-pressure synthesized small diamonds with Ge–V centers makes them promising candidates for single-photon emitters.