Quantum Accelerator: Towards Sub-picotesla quantum diamond magnetometers for Defense
Abstract
The primary objective of this work was to engineer NV ensembles at varying concentrations levels in (111) diamond. Diamond growth on (111) surfaces offers the potential to engineer NV centres in diamond that are aligned in a single orientation. The alignment improves the measured NV spin contrast and can lead to an enhanced magnetic sensitivity. Diamond material has been optimized for nanoscale magnetic sensing and imaging applications. In this work, we focused on achieving thick (111) NV ensembles suitable for bulk precision magnetometry applications. Using the commercial-grade diamond CVD reactor at the University of Melbourne, the team has engineered the first ultrapure (111) diamond layers in Australia. This represents the starting point for the NV incorporation study. We have characterized the surface morphology, optical properties and the growth rates from a series of nine diamond samples. The team has also refined the surface treatment prior to CVD growth to reduce substrate imperfections seeding into the grown layers.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 29, 2022
- Accession Number
- AD1180843
Entities
People
- Alastair Stacey
- Andrew D Greentree
- Brant C Gibson
- David A Simpson
- Liam T Hall
- Lloyd Hollenberg
- Scott Foster
Organizations
- Defence Science and Technology Group
- RMIT University
- University of Melbourne