Discovery of ST1 centers in natural diamond

Priyadharshini Balasubramanian, Mathias H. Metsch, Prithvi Reddy, Lachlan J. Rogers, Neil B. Manson, Marcus W. Doherty*, Fedor Jelezko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)
24 Downloads (Pure)


The ST1 center is a point defect in diamond with bright fluorescence and a mechanism for optical spin initialization and readout. The center has impressive potential for applications in diamond quantum computing as a quantum bus to a register of nuclear spins. This is because it has an exceptionally high readout contrast, and unlike the well-known nitrogen-vacancy center, it does not have a ground state electronic spin that decoheres the nuclear spins. However, its chemical structure is unknown, and there are large gaps in our understanding of its properties. We present the discovery of ST1 centers in natural diamond. Our experiments identify interesting power dependence of the center's optical dynamics and reveal new electronic structure. We also present a theory of its electron-phonon interactions, which we combine with previous experiments, to shortlist likely candidates for its chemical structure.

Original languageEnglish
Pages (from-to)1993-2002
Number of pages10
Issue number11
Publication statusPublished - Nov 2019

Bibliographical note

Copyright 2019 Marcus W. Doherty et al., published by De Gruyter, Berlin/Boston. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


  • ST1
  • diamond
  • color center
  • spectroscopy
  • electronic structure


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