Electrical control and read-out of color centers in diamond

该项目旨在开发技术，并展示钻石色心自旋状态的电气控制和读出的概念验证，重点是氮空位（NV）中心。我们将通过两个不同的概念来探讨钻石色心电荷状态的电气控制。一方面，在正向或反向偏置条件下，利用基于金刚石上不良氮化物基团纳米线的局部p-n异质二极管产生的电荷注入和外加电场来改变位于异质结附近的色心的电荷状态。在第二个发展中，我们将探索使用基于表面导电金刚石的场效应晶体管来电气控制表面带弯曲，从而控制植入表面附近的色心的电荷状态。此外，本项目还旨在通过电检测磁共振（EDMR）光谱来展示金刚石中NV中心自旋态的电读出。该项目包括三个主要活动模块：基于场效应器件的新型结构的开发，用于金刚石色心的电气控制，通过分子束外延制造AIGaN/金刚石p-n异质二极管，以及研究这些器件中的独立电子输运。

This project aims at the development of the technology and the demonstration of proof-of-concepts for the electrical control and read-out of spin states of color centers in diamond, with a focus on nitrogen-vacancy (NV) centers. The electrical control of the charge state of color centers in diamond will be explored via two different concepts. On the one hand, charge injection and applied electric fields generated in local p-n hetero Heterodiodes based on nanowires of group Ill-nitrides on diamond will be employed under forward or reverse bias conditions to modify the charge state of color centers positioned in the vicinity of the heterojunction. ln a second development, we will explore the use of field-effect transistors based on surface conductive diamond to electrically control the surface band bending and, thus, the charge state of color centers implanted near the surface. Furthermore, this project also aims at demonstrating the electric readout of the spin states of NV centers in diamond via electrically detected magnetic resonance (EDMR) spectroscopy. This project consists of three main activity blocks: the development of novel architectures based on field-effect devices for the electrical control of color centers in diamond, the fabrication of AIGaN/diamond p-n heterodiodes via molecular beam epitaxy and the investigation of spindependent electronic transport in these devices.