Optical Detection of Paramagnetic Defects in a CVD-grown Diamond

TL;DR

This paper demonstrates optical detection of paramagnetic defects in CVD-grown diamonds using NV centers, enabling detailed studies of the diamond's magnetic environment and potential quantum applications.

Contribution

It introduces a method to optically detect paramagnetic species in CVD diamonds via NV centers, advancing magnetic sensing and defect characterization.

Findings

Detection of hydrogen-related complexes in diamond

Magnetic field scans reveal paramagnetic species

Potential for coherent control of hyper-polarized spins

Abstract

The electronic spins of the nitrogen-vacancy centers (NV centers) in Chemical-Vapor-Deposition (CVD) grown diamonds form ideal probes of magnetic fields and temperature, as well as promising qu-bits for quantum information processing. Studying and controlling the magnetic environment of NV centers in such high purity crystals is thus essential for these applications. We demonstrate optical detection of paramagnetic species, such as hydrogen-related complexes, in a CVD-grown diamond. The resonant transfer of the NV centers' polarized electronic spins to the electronic spins of these species generates conspicuous features in the NV photoluminescence by employing magnetic field scans along the [100] crystal direction. Our results offer prospects for more detailed studies of CVD-grown processes as well as for coherent control of the spin of novel classes of hyper-polarized paramagnetic species.