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Quantum Sensing with Diamond

Defect centers in diamond can form highly versatile sensors that are capable of being used in many areas of quantum research. Their solid-state nature may allow us to develop high-performance devices that are quite portable and surpass the abilities of standard, classical systems.

Lincoln Laboratory Staff

Danielle Braje, Linh Pham, Chris McNally, John Barry

Campus Faculty

Dirk Englund (MIT, EECS), Paola Cappellaro (MIT, NSE)

A diamond crystal structure highlights a nitrogen defect adjacent to a missing carbon in the lattice together forming a nitrogen-vacancy (NV) center. These nitrogen-vacancy centers can be addressed optically by sending green light into a small diamond chip and observing red fluorescence. Each diamond sample contains many NV centers and they can be addressed in parallel and used as sensitive magnetic field sensors.

  • Develop high-conversion-efficiency, high-NV-density diamonds for magnetometry

Project Goals
  • Characterize and optimize diamond material for nitrogen-vacancy based quantum sensors

The exciting green laser is housed in the metal box with the window through which the diamond is visible.

  • Build high-sensitivity ensemble sensors

Project Goals
  • Establish the efficient use of large ensembles of nitrogen-vacancy (NV) centers for sensing applications

This diamond optical micro-resonator may enable resonant interaction with the NVs within and allow for enhanced sensors.

  • Develop power-budget-optimized quantum sensors in a compact form factor

Project Goals
  • Design an optical and microwave resonator to enhance the capability of NV magnetic field sensors
  • Develop laser threshold magnetometry using a whispering gallery mode resonator