Speaker
Description
NV centers in a diamond crystal consist of a substitutional nitrogen atom next to a lattice vacancy. These commonly appear in two distinct charge states, the neutral NV center (NV${^o}$) and the negatively charged NV center (NV${^-}$). While the more commonly formed state is the NV${^o}$ , the NV${^-}$ center has S = 1 fine structure that has important magnetic field dependent fluorescence properties due to its trapped electron. Fluorescence of the NV${^-}$ center has many applications include bio-labelling, thermometry, magnetometry, and quantum information, among many others. Research to improve the uniformity and replicability of manufactured NV${^-}$ center-containing films is of great importance. Microwave plasma assisted chemical vapor deposition (MPCVD) of diamond with \emph{in situ} nitrogen doping has shown promise in the synthesis of these heteroepitaxially grown centers[1]. Currently the effect of different nitrogen doping times on the growth of NV${^-}$ centers is not well understood.
This poster will present the results of an investigation of varying N${_2}$ doping times during diamond synthesis and how this affects the growth of both NV${^o}$ and NV${^-}$ centers within polycrystalline MPCVD diamond films. Investigation with Raman spectroscopy, photo luminescence spectroscopy and X-ray diffraction were carried out. By increasing or decreasing the N${_2}$ doping time and studying the variation of the intensity of the 637 nm NV${^-}$ photoluminescence (PL) spectral line, we derive a relationship between doping time and density of NV${^-}$ centers.
[1] Ejalonibu, H. A., Sarty, G. E., Bradley, M. P. (2019, April 25). "Optimal parameter(s) for the synthesis of nitrogen-vacancy (NV) centres in polycrystalline diamonds at low pressure" - \emph{Journal of Materials Science: Materials in Electronics.} SpringerLink. https://link.springer.com/article/10.1007/s10854-019-01376-z
| Keyword-1 | nitrogen vacancy centers |
|---|---|
| Keyword-2 | microwave plasma |
| Keyword-3 | chemical vapor depositions |
