The study of the efficiency of nitrogen to NV-center conversion in high nitrogen content samples

• Published in: arXiv.org
• Main Authors: Bolshedvorskii, S V, Tarelkin, S A, Soshenko, V V, Cojocaru, I S, Rubinas, O R, Sorokin, V N, Vins, V G, Smolyaninov, A N, Buga, S G, Galkin, A S, Drozdova, T E, Kuznetsov, M S, Nosukhin, S A, Akimov, A V
• Format: Paper Journal Article
• Language: English
• Published: Ithaca Cornell University Library, arXiv.org 05.08.2022
• Subjects: Color centers; Diamonds; Electron irradiation; Nitrogen; Noise sensitivity; Physics - Applied Physics; Physics - Materials Science; Physics - Optics; Radiation dosage
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2208.12706

The nitrogen-vacancy color center in diamond is one of the most important systems in the fast-growing field of sensing. This color centers are used in both high-resolution and high-sensitivity sensors. However, techniques for quick and efficient formations of this color center are still in the development stage. In this paper, we present a study on the influence of the electron irradiation dose on the conversion of substitutional nitrogen into \(\text{N}{{\text{V}}^{-}}\) centers. The study was done on diamonds that were highly enriched with nitrogen (~100 ppm), which on one hand should maximize the effect of irradiation, and on another be of interest for high-sensitivity magnetometers. The maximum achieved conversion efficiency was as high as \({37\pm 3.7}\), with no observed saturation on the electron dose even with the simplest annealing procedure. The measurements of the corresponding dephasing time made it possible to estimate for shot-noise limited sensitivity per unit volume of a stationary field sensor with such a diamond to be \({9\pm 1\times {{10}^{-14}}\text{T}}/{\sqrt{\text{Hz}\cdot \text{m}{{\text{m}}^{-3}}}\;\).