Wide-field magnetic imager with nanoscale resolution

具有纳米级分辨率的宽视场磁成像仪

• 批准号: 1310285
• 负责人: Ronald Walsworth
• 金额: $ 36万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-10-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1310285&HistoricalAwards=false
• 关键词: Wide; field; magnetic; imager; nanoscale

The objective of this project is the development of a high-sensitivity, wide-field diamond-based magnetic field imaging instrument suitable for applications in the physical and biological sciences. The approach is based on coherent microwave and optical manipulation of Nitrogen-Vacancy color centers implanted in a thin layer at the surface of a diamond chip. The Nitrogen-Vacancy center in diamond has emerged as a promising tool for quantum information, sensing, and metrology due to its long electronic spin coherence time at room temperature, and an unusual energy level structure that allows convenient optical spin polarization and readout. Recent work has demonstrated the potential of ensembles of Nitrogen-Vacancy centers for sensitive detection and imaging of stationary and time-varying magnetic fields, including those produced by biological samples. The intellectual merit of this program is the translation of techniques from fundamental quantum science into the development of a solid-state, room temperature magnetic imager with a combination of nanoscale spatial resolution, wide field-of-view, and excellent magnetic field sensitivity that cannot be obtained with any other technology. In addition, the unique physical properties of diamond (hardness, high thermal conductivity, optical transparency), together with its chemical inertness and excellent biocompatibility, make the diamond magnetic imager particularly well suited for sensing and imaging applications in materials science and biology.The broader impacts of this program include: (i) applying the diamond magnetic imager to a wide variety of physical and biological problems, e.g., probing magnetic order and domain structure in low-dimensional systems such as graphene, anti-ferromagnetic, and multiferroic materials, as well as minimally-invasive imaging of functional activity and magnetic structures in living cells such as magnetotactic bacteria; (ii) providing interdisciplinary training to students in condensed matter physics, nanoscience, optical imaging techniques, and quantum information science, as well as in application areas such as surface science and bioimaging, with a particular focus on inclusion of members of underrepresented groups in science and engineering; and (iii) performing outreach by communicating to a wider audience the exciting interdisciplinary nature of the proposed instrument development and the research it will enable, through public lectures, websites, magazine articles, and undergraduate course material.

该项目的目标是开发一种适用于物理和生物科学的高灵敏度、宽场金刚石基磁场成像仪器。 该方法是基于相干微波和光学操纵的氮空位色心植入在一个薄层在金刚石芯片的表面。 金刚石中的氮空位中心由于其在室温下的长电子自旋相干时间以及允许方便的光学自旋极化和读出的不寻常的能级结构而成为量子信息、传感和计量学的有前途的工具。 最近的工作已经证明了氮空位中心的集合体对固定和时变磁场（包括生物样品产生的磁场）的灵敏检测和成像的潜力。 该计划的智力价值是将基础量子科学的技术转化为固态室温磁成像仪的开发，该磁成像仪具有纳米级空间分辨率，宽视场和优异的磁场灵敏度，这是任何其他技术都无法获得的。 此外，金刚石独特的物理性能（硬度、高导热性、光学透明性），以及其化学惰性和优异的生物相容性，使金刚石磁成像仪特别适合材料科学和生物学领域的传感和成像应用。（i）将金刚石磁成像仪应用于各种各样的物理和生物问题，例如，探测低维系统（如石墨烯、反铁磁和多铁性材料）中的磁序和畴结构，以及活细胞（如趋磁细菌）中功能活动和磁结构的微创成像;（ii）为学生提供凝聚态物理学、纳米科学、光学成像技术和量子信息科学方面的跨学科培训，以及表面科学和生物成像等应用领域，特别注重吸收科学和工程领域代表性不足的群体的成员;和（iii）通过向更广泛的受众传达拟议的仪器开发的令人兴奋的跨学科性质及其将使研究能够进行，通过公开讲座，网站、杂志文章和本科课程材料。