Optical detection of paramagnetic defects in diamond using off-resonance excitation of NV centers

Nir Alfasi, Sergei Masis, Oleg Shtempluck, Eyal Buks

Research output: Contribution to journalArticlepeer-review


In this work we use fluorescence from nitrogen-vacancy defects in diamond to detect and explore other paramagnetic defects in the diamond, such as P1 defects, which are commonly undetectable through optical detection of magnetic resonance in standard conditions. Our method does not require overlap between the defects' resonances and therefore is applicable in a wide region of magnetic fields and frequencies, as verified by excellent fit to theoretical predictions. We propose a depolarization scheme of P1 defects to account for the observed data. To verify our results, we perform cavity-based detection of magnetic resonance and find a good agreement between the measured optically induced polarization and the value obtained theoretically from rate equations. The findings in this work may open the way to detection of paramagnetic defects outside of the diamond through the photoluminesence of nitrogen-vacancy defects, which might be useful for imaging in biology.
Original languageEnglish
Article number214111
JournalPhysical Review B
Issue number21
StatePublished - 5 Apr 2019


  • cond-mat.mes-hall
  • quant-ph

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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