【报告信息】

主题：Progress towards engineering useful functional defects with optimized quantum properties into diamond

时间：2026年11月10日（星期二）14:00-15:00

地点：复旦大学江湾校区二号学科交叉楼B2005

联系人：叶海涛

【报告简介】

The negatively charged nitrogen-vacancy (NV⁻) centre in diamond exhibits long spin coherence times and high sensitivity to electric and magnetic fields. Combined with its intrinsic capability for optical spin initialisation and readout at room temperature, these properties make it a promising platform for a wide range of applications, including quantum sensing, nanophotonics, quantum memory and quantum information processing. In addition to fundamental issues such as weak zero phonon emission and limited spin readout fidelity, the performance of NV⁻ centres is limited by a combination of materials, fabrication, and scalability challenges. Some of the most significant problems are magnetic noise from nearby spins, electric-field and strain noise, charge-state instability, surface noise, poor reproducibility and yield, localisation and scaling challenges, and orientation disorder. Many scalable quantum technologies require shallow, integrated, optically efficient, charge-stable, and reproducibly positioned NV⁻ centres. Achieving all of these simultaneously remains the major challenge. In this presentation we will review our progress towards a better understanding of how to optimise NV⁻ centre production by nitrogen doping + electron irradiation + annealing or ion implantation + annealing with both co-doping and improved surface processing. We will also review progress on surface structuring + overgrowth to produce preferentially oriented NV⁻ centres.

【主讲人介绍】

Mark Newton’s research focuses on; (i) understanding, controlling and exploiting the properties of colour centres and dopant atoms in diamond (Quantum Technology); (ii) developing sensors that exploit the extreme and unique combination of properties offered by diamond, and (iii) developing new techniques in magnetic and optical spectroscopy. Mark was winner of the 2017 Royal Society Innovation Award. Having held academic positions at the University of Oxford and King’s College London, Mark moved back to Warwick in 2002, where he had previously been and undergraduate.