Isotopically varying spectral features of silicon-vacancy in diamond

Andreas Dietrich*, Kay D. Jahnke, Jan M. Binder, Tokuyuki Teraji, Junichi Isoya, Lachlan J. Rogers, Fedor Jelezko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

79 Citations (Scopus)


The silicon-vacancy centre (SiV-) in diamond has exceptional spectral properties for single-emitter quantum information applications. Most of the fluorescence is concentrated in a strong zero phonon line (ZPL), with a weak phonon sideband extending for 100 nm that contains several clear features. We demonstrate that the ZPL position can be used to reliably identify the silicon isotope present in a single SiV- centre. This is of interest for quantum information applications since only the 29Si isotope has nuclear spin. In addition, we show that the sharp 64 meV phonon peak is due to a local vibrational mode of the silicon atom. The presence of a local mode suggests a plausible origin of the measured isotopic shift of the ZPL.

Original languageEnglish
Article number113019
Pages (from-to)1-10
Number of pages10
JournalNew Journal of Physics
Publication statusPublished - 11 Nov 2014
Externally publishedYes


  • diamond
  • isotope
  • local vibrational mode
  • phonon sideband
  • silicon
  • silicon vacancy center
  • ZPL


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