Blog
About

14
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Enhanced concentrations of nitrogen-vacancy centers in diamond through TEM irradiation

      Preprint

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          One of the challenges in spin ensemble-based magnetometry and many-body spin physics in solid state systems is to enhance the spin concentration while maintaining long coherence times. In particular, for an ensemble of nitrogen-vacancy (NV) centers in diamond, high conversion efficiencies between nitrogen (P1) defects and NV centers are essential for quantum information and sensing applications. In this work, we study the effect of electron irradiation on the conversion efficiency of various types of HPHT and CVD diamond samples with different initial nitrogen concentrations. The samples were irradiated using a 200 keV transmission electron microscope (TEM). We observe an order of magnitude improvement in the NV concentration (up to ~ 10^11 NV/cm2), without any degradation in their coherence properties. We find that the efficiency of NV creation strongly depends on the initial conversion efficiency as well as on the initial nitrogen concentration. The achieved ~ 10% conversion efficiency from N defects to NV centers in the diamond suggests that such irradiation processes can improve the sensitivity of DC and AC magnetometry, and pave the way toward the study of many-body physics of ensembles of NV spins.

          Related collections

          Most cited references 2

          • Record: found
          • Abstract: found
          • Article: found
          Is Open Access

          Quantum correlation in disordered spin systems: entanglement and applications to magnetic sensing

          We propose a strategy to generate a many-body entangled state in a collection of randomly placed, dipolarly coupled electronic spins in the solid state. By using coherent control to restrict the evolution into a suitable collective subspace, this method enables the preparation of GHZ-like and spin-squeezed states even for randomly positioned spins, while in addition protecting the entangled states against decoherence. We consider the application of this squeezing method to improve the sensitivity of nanoscale magnetometer based on Nitrogen-Vacancy spin qubits in diamond.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: found
            Is Open Access

            Diamond Magnetometry of Meissner Currents in a Superconducting Film

            We study magnetic field penetration into a thin film made of a superconducting niobium. Imaging of magnetic field is performed by optically detecting magnetic resonances of negatively charged nitrogen-vacancy defects inside a single crystal diamond, which is attached to the niobium film under study. The experimental results are compared with theoretical predictions based on the critical state model, and good agreement is obtained.
              Bookmark

              Author and article information

              Journal
              2017-02-17
              Article
              1702.05332

              http://arxiv.org/licenses/nonexclusive-distrib/1.0/

              Custom metadata
              quant-ph

              Quantum physics & Field theory

              Comments

              Comment on this article