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Benchmark for Synthesized Diamond Sensors Based on Isotopically Engineered Nitrogen‐Vacancy Spin Ensembles for Magnetometry Applications
Author(s) -
Osterkamp Christian,
Balasubramanian Priyadharshini,
Wolff Gerhard,
Teraji Tokuyuki,
Nesladek Milos,
Jelezko Fedor
Publication year - 2020
Publication title -
advanced quantum technologies
Language(s) - English
Resource type - Journals
ISSN - 2511-9044
DOI - 10.1002/qute.202000074
Subject(s) - diamond , dynamical decoupling , magnetometer , quantum sensor , vacancy defect , limiting , nanotechnology , electron paramagnetic resonance , nitrogen vacancy center , materials science , quantum , spin (aerodynamics) , magnetic field , physics , condensed matter physics , quantum computer , nuclear magnetic resonance , quantum simulator , mechanical engineering , quantum mechanics , engineering , composite material , thermodynamics
Nitrogen‐vacancy (NV) center ensemble in synthetic diamond is a promising and emerging platform for quantum sensing technologies. Realization of such a solid‐state based quantum sensor is widely studied and requires reproducible manufacturing of NV centers with controlled spin properties, including the spin bath environment within the diamond crystal. Here, a non‐invasive method is reported to benchmark NV ensembles regarding their suitability as ultra‐sensitive magnetic field sensors. Imaging and electron spin resonance techniques are presented to determine operating figures and precisely define the optimal material for NV‐driven diamond engineering. The functionality of the methods is manifested on examples of chemical vapor deposition synthesized diamond layers containing preferentially aligned, isotopically controlled 15 NV center ensembles. Quantification of the limiting 15 N P1 spin bath, in an otherwise 12 C enriched environment, and the reduction of its influence by applying dynamical decoupling protocols, complete the suggested set of criteria for the analysis of NV ensemble with potential use as magnetometers.