The Generation Of Nitrogen- Vacancy Center In Bulk Diamond By Ion Implantation

The increasing demand of computational capability and data transmission inspired scientists to find out new information process. Among various schemes, quantum information and quantum computation attracted much attention as a field full of challenges. Shor’s discovery of quantum factoring algorithm and Grover’s quantum searching algorithm showed that quantum computation may have powerful capacity that exceed the classical computer. However it have many problems to solve for realizing quantum line and quantum logic gate.The nitrogen-vacancy center in bulk diamond has gained its popularity among people because of its good properties:strong fluorescence intensity in visible band; long coherent time; emitting only one photon at one time; stable in room temperature. NV centers comprises a substitutional nitrogen and an adjacent vacancy in diamond lattice. It has a 1.945eV zero phonon line (ZPL), there we refer to negative charged NV centers as we describe in main text. It is very stable, the ZPL can be seen even at room temperature. Through the study of spectral hole burning and nuclear-magnetic resonance, people found that NV center has triplet ground states and excited states, at least one singlet metastable state.The research group successfully generated NV centers in bulk diamond by ion implantation method. And we optimized the experiment by integrating with micro-nano fabrication technology. A lot of efforts had been made during the ion implantation and annealing process by optimizing the parameters, and the fluorescence intensity, the coherent time and the magnetic coupling strength of the artificial NV centers were indeed improved. In the end we successfully got the arrays of NV centers, single NV centers and NV center pairs in bulk diamond samples. With these NV center samples, the research group had done some nice work such as quantum statistical imaging of particles without restriction of the diffraction limit and subdiffraction optical manipulation of the charge state of nitrogen vacancy center in diamond.