Silicon-vacancy color centers in phosphorous-doped diamond for bright single-photon emission under electrical pumping

掺磷金刚石中的硅空位色心可在电泵浦下实现明亮的单光子发射

• 批准号: 410405168
• 负责人: Professor Dr. Mario Agio
• 金额: --
• 依托单位: Russian Foundation for Basic Research
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/410405168?language=en
• 关键词: Silicon; vacancy; color; centers; phosphorous

Efficient and scalable single-photon sources (SPSs) are crucial to the development of numerous quantum information technologies, such as optical quantum computers and unconditionally secure communication lines. SPSs based on quantum dots have shown much progress in the last two decades, but under ambient conditions they are being overcome by the recent advances in color centers in diamond and related wide-bandgap semiconductors. Color centers are point defects in the crystal lattice that behave nearly as isolated atoms. This property allows to obtain bright photo- and electroluminescence with a sharp emission spectrum, which cannot be achieved with any other quantum optoelectronic system under ambient conditions. However, it is still challenging to design scalable and reproducible technologies based on these emitters. In particular, it is difficult to precisely combine them with photonic and electronic nanostructures that are needed for achieving high brightness and control.This project aims at developing and investigating a novel class of bright SPSs on diamond, which operate under ambient conditions and that can be efficiently electrically driven. The project will generate an interdisciplinary collaboration and it is based on two recently proposed concepts. First, to enhance the emission properties of the color center we will use a planar antenna, which enables large extraction efficiencies and strong directional emission from materials with a large refractive index. This approach does not require fine spectral tuning nor precise positioning of the emitter at the nanoscale, which is beneficial for fabrication and device operation. Second, we will employ a novel electrical pumping scheme based on a Schottky diode, which gives the possibility of efficiently injecting minority carriers in diamond directly from the metal and it does not require complex and expensive p-i-n and p-n diamond junctions. We will create high-quality silicon-vacancy (SiV) centers in less than 100-nm-thick diamond membranes and build a planar antenna with electrodes on it. We will investigate the photon emission properties (focusing on brightness, directionality) under optical pumping and explore the possibility of electrical excitation of SiV centers at room an higher temperatures. Thus, we will demonstrate a proof of concepts of a highly efficient and chip-scale SPS that will serve as, and inspire, novel photonic sources for quantum information and quantum communication. Our activities will also generate valuable knowledge in nanophotonics and materials science, which shall be transferred to other application areas.

高效且可扩展的单光子源（SPS）对于开发众多量子信息技术至关重要，例如光学量子计算机和无条件安全的通信线。在过去的二十年中，基于量子点的SPS已显示出很大的进展，但是在环境条件下，钻石和相关的宽带半导体的最新进展正在克服它们。颜色中心是晶格中的点缺陷，其表现几乎像孤立的原子一样。该特性允许以急剧的发射光谱获得明亮的光 - 和电致发光，在环境条件下，在任何其他量子光电系统中都无法实现。但是，设计基于这些发射器的可扩展和可重复的技术仍然具有挑战性。特别是，很难将它们与光子和电子纳米结构相结合，这些纳米结构是实现高亮度和控制所需的。该项目旨在开发和研究在环境条件下运行的钻石上新型的明亮SPSS，并且可以有效地通过电气驱动。该项目将产生跨学科的合作，并基于两个最近提出的概念。首先，为了增强颜色中心的发射特性，我们将使用平面天线，该天线可以从具有较大折射率的材料中提取较高的提取效率和强大的方向发射。这种方法不需要精细的光谱调整，也不需要发射极在纳米级的精确定位，这对制造和装置操作是有益的。其次，我们将采用基于Schottky二极管的新型电动抽水方案，该二极管可以直接从金属中直接从钻石中注入少数族裔载体，并且不需要复杂且昂贵的P-I-N和P-N钻石连接。我们将在不到100 nm的钻石膜中创建高质量的硅离子（SIV）中心，并在其上建立带有电极的平面天线。我们将研究光泵送下的光子发射特性（侧重于亮度，方向性），并探索在较高温度下对SIV中心电激发的可能性。因此，我们将展示一个高效和碎屑尺度SP的概念证明，该概念将作为量子信息和量子通信的新型光子源并激发新的光子源。我们的活动还将在纳米谱和材料科学方面产生宝贵的知识，这些知识应转移到其他应用领域。