Quantum Defects in Diamond: Identifying Nitrogen Isotopes of Nitrogen-Vacancy Centers
Faculty Sponsor(s)
Joelle Murray
Subject Area
Physics/Applied Physics
Description
Nitrogen-vacancy (NV) centers are point defects in diamond formed by one substitutional nitrogen atom and an adjacent vacancy. Low spectral diffusion is a necessary property for NV centers to be qubit candidates. To characterize differences between naturally formed and ion implanted NV centers, diamond samples were studied that contained both types. The ion implantation used 15N to be able to differentiate from the 14N naturally formed NV centers. This project focused on identifying the isotope of a single NV center, which is the first step toward understanding differences in their emissive properties. Code was developed to execute, and then automate, the three experiments necessary to identify the isotope of a single NV center: Continuous Wave Optically Detected Magnetic Resonance (CW ODMR), Rabi oscillations, and Pulsed ODMR. These experiments resolve the hyperfine interaction of the NV center’s nuclear spin states. The code was implemented on a test sample, where it successfully identified the isotope of several NV centers. The next step in this project is to link the isotope of NV centers to their emissive properties, with a goal of producing reliable qubits for quantum information processing circuits.
Recommended Citation
Chamberlain, Morgan, "Quantum Defects in Diamond: Identifying Nitrogen Isotopes of Nitrogen-Vacancy Centers" (2020). Linfield University Student Symposium: A Celebration of Scholarship and Creative Achievement. Event. Submission 22.
https://digitalcommons.linfield.edu/symposium/2020/all/22
Quantum Defects in Diamond: Identifying Nitrogen Isotopes of Nitrogen-Vacancy Centers
Nitrogen-vacancy (NV) centers are point defects in diamond formed by one substitutional nitrogen atom and an adjacent vacancy. Low spectral diffusion is a necessary property for NV centers to be qubit candidates. To characterize differences between naturally formed and ion implanted NV centers, diamond samples were studied that contained both types. The ion implantation used 15N to be able to differentiate from the 14N naturally formed NV centers. This project focused on identifying the isotope of a single NV center, which is the first step toward understanding differences in their emissive properties. Code was developed to execute, and then automate, the three experiments necessary to identify the isotope of a single NV center: Continuous Wave Optically Detected Magnetic Resonance (CW ODMR), Rabi oscillations, and Pulsed ODMR. These experiments resolve the hyperfine interaction of the NV center’s nuclear spin states. The code was implemented on a test sample, where it successfully identified the isotope of several NV centers. The next step in this project is to link the isotope of NV centers to their emissive properties, with a goal of producing reliable qubits for quantum information processing circuits.
