2023 CAP Congress / Congrès de l'ACP 2023

(G*) (POS-12) MPCVD Diamond Films with varying Nitrogen Doping Times : Effect on NV Center Synthesis

20 Jun 2023, 17:36

2m

Richard J. Currie Center (University of New Brunswick)

Poster Competition (Graduate Student) / Compétition affiches (Étudiant(e) 2e ou 3e cycle) Plasma Physics / Physique des plasmas (DPP) DPP Poster Session & Student Poster Competition (3) | Session d'affiches DPP et concours d'affiches étudiantes (3)

Speaker

William Davis (University of Saskatchewan)

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