Strongly inhomogeneous distribution of spectral properties of silicon-vacancy color centers in nanodiamonds

Sarah Lindner, Alexander Bommer, Andreas Muzha, Anke Krueger, Laia Gines, Soumen Mandal, Oliver Williams, Elisa Londero, Adam Gali, Christoph Becher

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The silicon-vacancy (SiV) color center in diamond is a solid-state single photon emitter and spin quantum bit suited as a component in quantum devices. Here, we show that SiV centers in nanodiamonds exhibit a strongly inhomogeneous distribution with regard to the center wavelengths and linewidths of the zero-phonon-line (ZPL) emission at room temperature. We find that the SiV centers separate in two clusters: one group exhibits ZPLs with center wavelengths within a narrow range ≈730-742 nm and broad linewidths between 5 and 17 nm, whereas the second group comprises a very broad distribution of center wavelengths between 715 and 835 nm, but narrow linewidths from below 1 up to 4 nm. Supported by ab initio Kohn-Sham density functional theory calculations we show that the ZPL shifts of the first group are consistently explained by strain in the diamond lattice. Further, we suggest, that the second group showing the strongly inhomogeneous distribution of center wavelengths might be comprised of a new class of silicon-related defects. Whereas single photon emission is demonstrated for defect centers of both clusters, we show that emitters from different clusters show different spectroscopic features such as variations of the phonon sideband spectra and different blinking dynamics.

Original languageEnglish
Article number115002
JournalNew Journal of Physics
Volume20
Issue number11
DOIs
Publication statusPublished - Nov 7 2018

Keywords

  • color centers
  • density functional theory calculations
  • diamond
  • nanodiamond
  • optical emission
  • single photons

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Lindner, S., Bommer, A., Muzha, A., Krueger, A., Gines, L., Mandal, S., Williams, O., Londero, E., Gali, A., & Becher, C. (2018). Strongly inhomogeneous distribution of spectral properties of silicon-vacancy color centers in nanodiamonds. New Journal of Physics, 20(11), [115002]. https://doi.org/10.1088/1367-2630/aae93f