Wide-field strain imaging with preferentially aligned nitrogen-vacancy centers in polycrystalline diamond

Abstract

We report on wide-field optically detected magnetic resonance imaging of nitrogen-vacancy centers (NVs) in type IIa polycrystalline diamond. These studies reveal a heterogeneous crystalline environment that produces a varied density of NV centers, including preferential orientation within some individual crystal grains, but preserves long spin coherence times. Using the native NVs as nanoscale sensors, we introduce a three-dimensional strain imaging technique with high sensitivity ( 10 5 < -Hz -1/2 ) and diffraction-limited resolution across a wide field of view.

Optimization of a Diamond Nitrogen Vacancy Centre Magnetometer for Sensing of Biological Signals

“…Careful selection of exposure dose, 12 C isotopic purification to remove the negative effects of 13 C spins [30,31] and understanding the role of strain [32] are key to maximizing sensitivity by achieving narrow microwave resonance linewidths and high fluorescence contrast (change in output between microwaves on/off). In this work we use a diamond (grown at LSPM, Paris) with a 20 µm CVD-grown 12 C purified layer, doped with 5 ppm nitrogen-14, carefully irradiated using H + ions (at U. Leipzig) and subsequently annealed at 800 • C. Figure 2 shows ODMR for our 12 C purified diamond.…”

Spin properties of NV centers in high-pressure, high-temperature grown diamond

“…where L(x, x 0 , γ) is a Lorentzian function of the form L(x, x 0 , γ) = γ 2 /[(x − x 0 ) 2 +γ 2 ]; E ⊥ is the effective energy of interaction with the strain fields (see, for example, [43] for details); f is swept MW frequency; f 0 is the resonance frequency; Γ is the linewidth of the ODMR spectrum; D ZFS is 2.87 MHz zero field splitting; A || is hyperfine constant; and E ⊥ is the energy of interaction with transverse strain fields.…”

Strain sensitivity and symmetry of 2.65 eV color center in diamond nanoscale needles

“…Color centers in diamond, in particular nitrogen-vacancy (NV) centers, have been investigated for the implementation of quantum bits for quantum information processing and for the development of nanoscale electromagnetic field, temperature or pressure sensors. [1][2][3][4][5] In particular, in the case of the strain field, color centers were used to assess the stress tensor through single defect spectroscopy 3,6,7 and, inversely, the radiative optical transition of single NV defect centers could be controlled by the strain field. 8 All these studies open the way to the realization of strain-coupled hybrid spin-oscillator systems, where the NV center spins interact with the resonant phonon modes of a macromechanical resonator through crystal strain.…”