EAGER: Manufacturing of Diamond Nanocrystals for Quantum Applications

EAGER：用于量子应用的金刚石纳米晶体的制造

• 批准号: 2103058
• 负责人: Raj Singh
• 金额: $ 15万
• 依托单位: Oklahoma State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-01-01 至 2023-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2103058&HistoricalAwards=false
• 关键词: EAGER; Manufacturing; Diamond; Nanocrystals; Quantum

This EArly-concept Grants for Exploratory Research (EAGER) award aims at studying the fundamental science and engineering for nanomanufacturing of diamond crystal arrays for use in many novel applications, such as, quantum computing, magnetic field sensing, spintronics, encryption, and nanomedicine. Diamond nanocrystals containing nitrogen-vacancy (NV) defect centers display properties that can be controlled by microwave, optical signal, electric and magnetic fields thereby making them useful for a myriad of quantum applications. To function as components of quantum devices, each nanometer or micrometer size diamond single crystal should preferably contain only one type of NV defect center and, when arranged into isolated diamond single crystal arrays, achieve the greatest sensitivity and individual addressability. This project develops approaches to manufacture diamond single crystal arrays containing NV defect centers that are preferentially oriented along a single crystallographic direction. In addition, the project provides education and training to graduate and undergraduate students towards workforce development and careers in academia or industry. The research findings are disseminated to the scientific community and expected to have significant impacts on several national initiatives such as advanced manufacturing, nanotechnology, quantum information sciences, optoelectronics, medicine, and national security.The state-of-the-art in quantum technology employs diamond thin films or bulk crystals containing NV defects that are unsuited for wide-spread use because the NV defects are randomly distributed and cannot be individually addressed for many of the novel quantum applications. The objective of the project is to demonstrate proof-of-concept for manufacturing of epitaxial diamond single crystal arrays with enhanced preferred orientation of the NV defect centers. The scientific justifications for the overall program are based on three transformative hypotheses that include (1) bias-enhanced nucleation for creating an array of epitaxial diamond nuclei on patterned single crystal silicon substrates followed by the growth of the diamond crystals; (2) role of substrate orientations promoting preferential orientation of the NV defect centers along 111 crystallographic direction based on planar atom density; and (3) application of electric and/or magnetic fields during manufacturing by Microwave Plasma Enhanced Chemical Vapor Deposition (MPECVD) for additional preferential alignment of the NV defect centers. The project advances the fundamental understanding of the roles of in situ doping by nitrogen, diamond nucleation and growth mechanisms, substrate orientation, and applied electric and/or magnetic fields on the NV defect centers. The quality of the diamond nanocrystals is determined by quantitative characterization of spin state addressability based on changes in optical emission upon exposure of the nanocrystals to microwave and laser pumping using optically detected magnetic resonance.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

这项探索性研究的早期概念授予（急切）旨在研究用于在许多新型应用中使用的钻石晶体阵列纳米制造的基本科学和工程，例如，量子计算，磁场感应，旋转型，加密，加密，加密和纳米医学。含有氮呈（NV）缺陷中心的钻石纳米晶体显示可通过微波，光信号，电气和磁场控制的特性，从而使其可用于多种量子应用。为了充当量子设备的组件，每个纳米或千分尺尺寸的钻石单晶应优选仅包含一种NV缺陷中心，并且在排列到孤立的钻石单晶阵列中时，可以达到最大的灵敏度和个人的可寻址性。该项目开发了制造钻石单晶阵列的方法，该钻石单晶阵列包含NV缺陷中心，这些缺陷中心优先沿单个晶体学方向定向。此外，该项目还为研究生和本科生提供教育和培训，以实现学术界或行业的劳动力发展和职业。研究发现将分解给科学界，并预计将对几种国家倡议产生重大影响对于许多新型量子应用。该项目的目的是展示概念概念，用于制造具有增强的NV缺陷中心优选方向的外延钻石单晶阵列。整个程序的科学理由是基于三个变革性假设，其中包括（1）在图案化的单晶硅底物上创建一系列外延钻石核的偏置增强成核，然后是钻石晶体的生长； （2）基于平面原子密度沿111晶体学方向促进NV缺陷中心优先取向的底物方向的作用； （3）通过微波等离子体增强化学蒸气沉积（MPECVD）制造过程中电气和/或磁场的应用，以额外优先排列NV缺陷中心。该项目提高了对NV缺陷中心上氮，钻石成核和生长机制，底物方向以及施加的电气和/或磁场的基本理解。钻石纳米晶体的质量取决于旋转状态可寻址性的定量表征，基于光学发射的变化，在使用光学检测到的磁共振上暴露于微波炉和激光泵送后，该奖项反映了NSF的法定任务，反映了使用基金会的智力效果和广泛的crotial and Impactia and Impactia and Intfactial and crowia and crowia the Support。

项目成果

Diamond nucleation in carbon films on Si wafer during microwave plasma enhanced chemical vapor deposition for quantum applications

• DOI: 10.1063/5.0143800
• 发表时间: 2023-04
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: Vidhya Sagar Jayaseelan;Raj N. Singh