Optically detected magnetic resonance of nitrogen vacancies in a diamond anvil cell using designer diamond anvils

Abstract

Optically detected magnetic resonance of nitrogen vacancy centers in diamond offers novel routes to both DC and AC magnetometry in diamond anvil cells under high pressures (> 3 GPa). However, a serious challenge to realizing experiments has been the insertion of microwave radiation in to the sample space without screening by the gasket material. We utilize designer anvils with lithographically-deposited metallic microchannels on the diamond culet as a microwave antenna. We detected the spin resonance of an ensemble of microdiamonds under pressure, and measure the pressure dependence of the zero field splitting parameters. These experiments enable the possibility for all-optical magnetic resonance experiments on sub-µL sample volumes at high pressures.

Imaging the Local Charge Environment of Nitrogen-Vacancy Centers in Diamond

“…First, we demonstrate that the characteristic splitting of the NV's magnetic resonance spectrum ( Fig. 1a), observed in ensemble NV experiments [9,14,[43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59], originates from its local electric environment [60]; this contrasts Typical optically-detected magnetic resonance (ODMR) spectrum of an electron-irradiated and annealed Type-Ib diamond sample (S1) at zero magnetic field. The spectrum exhibits heavy tails which cannot be reproduced by either a double Lorentzian or Gaussian (orange fit) profile.…”

“…2b, one finds that the central hyperfine resonance is split in direct analogy to the prior spectra. The most distinct of the aforementioned features -a split central resonance -has typically been attributed to the presence of lattice strain [9,[44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59]. Such strain can indeed lead to a coupling between the |m s = ±1 states, and thus split their energy levels.…”

Imaging stress and magnetism at high pressures using a nanoscale quantum sensor

“…Crucially, both the nature and energy of these spin states are sensitive to local changes in stress, temperature, and magnetic and electric fields ( Fig. 1C) (13)(14)(15)(16)(17)(18)(19). These spin states can be optically initialized and read out, as well as coherently manipulated through microwave fields.…”

Probing Local Pressure Environment in Anvil Cells with Nitrogen-Vacancy (N-V−) Centers in Diamond

“…dD/d p (MHz/kbar) Pressure medium Steele et al 48 1.172 ± 0.068 Daphne 7373 Doherty et al 36 1.458 ± 0.006 NaCl / Ne Yip et al 32 1.45 Glycerol Ivady et al 38 1.030 Theory This work 1.49 ± 0.02 Daphne 7373 In Fig. 2(a), a strong increase of linewidth versus pressure can be seen.…”