Multiphoton resonances in nitrogen-vacancy defects in diamond
arXiv:1904.04783 · doi:10.1103/PhysRevA.100.013852
Abstract
Dense ensembles of nitrogen vacancy (NV) centers in diamond are of interest for various applications including magnetometry, masers, hyperpolarization and quantum memory. All of the applications above may benefit from a non-linear response of the ensemble, and hence multiphoton processes are of importance. We study an enhancement of the NV ensemble multiphoton response due to coupling to a superconducting cavity or to an ensemble of Nitrogen 14 substitutional defects (P1). In the latter case, the increased NV sensitivity allowed us to probe the P1 hyperfine splitting. As an example of an application, an increased responsivity to magnetic field is demonstrated.
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