Diamond-based field sensor for nEDM experiment

Sarvagya Sharma, Chris Hovde, Douglas H Beck

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Ensembles of negatively charged nitrogen vacancy centers in diamonds are investigated as optical sensors for electric and magnetic fields in the interaction region of a neutron electric dipole moment experiment. As a first step towards measuring electric fields, the Stark shift is investigated in the ground electronic state, using optically detected magnetic resonance (ODMR) to measure hyperfine-resolved fine structure transitions. One detection approach is to modulate the electric field and demodulate the ODMR signal at the modulation frequency or its harmonic. Models indicate that the ratio of the amplitudes of these signals provides information about the magnitude of the electric field. Experiments show line shapes consistent with the models. Methods are considered for extending this technique to all-optical measurement of fields. Additionally, progress is reported towards an all-optical, fiberized sensor based on electromagnetically-induced transparency (EIT), which may be suitable for measuring magnetic fields. The design uses total internal reflection to provide a long optical path through the diamond for both the 637 nm EIT laser and a green repump laser.

Original languageEnglish (US)
Title of host publicationQuantum Sensing and Nano Electronics and Photonics XIII
EditorsGail J. Brown, Manijeh Razeghi, Jay S. Lewis
ISBN (Electronic)9781628419900
StatePublished - 2016
EventQuantum Sensing and Nano Electronics and Photonics XIII - San Francisco, United States
Duration: Feb 14 2016Feb 18 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


OtherQuantum Sensing and Nano Electronics and Photonics XIII
Country/TerritoryUnited States
CitySan Francisco


  • diamond
  • electric field
  • nEDM
  • neutron
  • nitrogen

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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