RUI: Coherent Spectroscopy of Defects in Solids

RUI：固体缺陷的相干光谱学

• 批准号: 2003493
• 负责人: Christopher Smallwood
• 金额: $ 32.82万
• 依托单位: San Jose State University Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2003493&HistoricalAwards=false
• 关键词: RUI; Coherent; Spectroscopy; Defects; Solids

Nontechnical descriptionColor centers in diamond are defects that absorb and emit light in an otherwise transparent crystal. Besides contributing to the striking visual characteristics of gemstones like fancy colored diamonds, these centers—and related defects in other materials—offer great promise for use as hardware elements in quantum computers and networks. This project aims to characterize the properties of defects in solids using laser-based measurements. Outcomes of the project include the discovery of information about these materials that will be used to fabricate more effective quantum devices, thereby enhancing American international competitiveness in information technology. The PI’s research team comprises a diverse group of undergraduate researchers and master’s students who take on leading roles at every stage of the scientific process, developing workforce skills and analytical abilities that are well-suited to the challenges and opportunities of the 21st-century economy. Data from the project are used to facilitate classroom instruction and outreach efforts at the PI’s institution. Finally, the PI conducts additional outreach efforts with the local academic community, including community colleges, and with the public at large.Technical descriptionIn recent years, defects in solid-state materials have drawn attention because their relatively long electron excited-state lifetimes and coherence properties mark them as potentially useful in devices relevant to quantum information processing and quantum computation. This project is oriented toward understanding the coherent optical properties of defect states in solids using equilibrium and time-resolved spectroscopic tools, with a special emphasis on the construction and utilization of a novel interferometric measurement system for conducting collinear optical multidimensional coherent spectroscopy (MDCS). Material systems to be studied include Nd:YVO4, excitons and localized states in transition metal dichalcogenides, silicon-vacancy (SiV) centers in diamond, and silicon vacancy (VSi) centers in 4H-SiC. Scientific objectives include extracting defect-state single particle dephasing times, measuring interparticle interactions, developing an enhanced understanding of microscopic mechanisms leading to decoherence phenomena in solids, and discovering completely new types of defect state resonances.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.

钻石中的色心是透明晶体中吸收和发射光线的缺陷。除了有助于宝石（如彩色钻石）的引人注目的视觉特征外，这些中心以及其他材料中的相关缺陷为量子计算机和网络中的硬件元件提供了巨大的希望。该项目旨在使用基于激光的测量来表征固体中缺陷的特性。该项目的成果包括发现有关这些材料的信息，这些材料将用于制造更有效的量子器件，从而增强美国在信息技术方面的国际竞争力。PI的研究团队由一群多元化的本科研究人员和硕士生组成，他们在科学过程的每个阶段都发挥着主导作用，培养了非常适合21世纪经济挑战和机遇的劳动力技能和分析能力。该项目的数据用于促进PI所在机构的课堂教学和外联工作。最后，PI与当地学术界（包括社区大学）和公众进行额外的外联工作。技术预防近年来，固态材料的缺陷引起了人们的关注，因为它们相对较长的电子激发态寿命和相干特性标志着它们在量子信息处理和量子计算相关设备中具有潜在的用途。该项目是面向理解的相干光学性质的缺陷状态在固体中使用平衡和时间分辨光谱工具，特别强调的建设和利用一种新的干涉测量系统进行共线光学多维相干光谱（MDCS）。待研究的材料系统包括Nd：YVO 4、过渡金属二硫属化物中的激子和局域态、金刚石中的硅空位（SiV）中心和4 H-SiC中的硅空位（VSi）中心。科学目标包括提取缺陷态单粒子退相时间、测量粒子间相互作用、加深对导致固体退相干现象的微观机制的理解以及发现全新类型的缺陷态共振。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Reflections on the Physics and Astronomy Student Reading Society (PhASRS) at San José State University

对圣何塞州立大学物理和天文学学生阅读协会（PhASRS）的思考

• DOI: 10.1119/5.0100363
• 发表时间: 2023
• 期刊: The Physics Teacher
• 作者: Johnson, Sidney L.;Hatzikoutelis, Athanasios;Smallwood, Christopher L.
• 通讯作者: Smallwood, Christopher L.

Low-cost quadrature optical interferometer

低成本正交光学干涉仪

• DOI: 10.1119/5.0110405
• 发表时间: 2023
• 期刊: American Journal of Physics
• 影响因子: 0.9
• 作者: Melody, Tanner M.;Patel, Krishna H.;Nguyen, Peter K.;Smallwood, Christopher L.
• 通讯作者: Smallwood, Christopher L.

Using silicon-vacancy centers in diamond to probe the full strain tensor

使用金刚石中的硅空位中心探测全应变张量

• DOI: 10.1063/5.0052613
• 发表时间: 2021
• 期刊: Journal of Applied Physics
• 影响因子: 3.2
• 作者: Bates, Kelsey M.;Day, Matthew W.;Smallwood, Christopher L.;Owen, Rachel C.;Schröder, Tim;Bielejec, Edward;Ulbricht, Ronald;Cundiff, Steven T.
• 通讯作者: Cundiff, Steven T.