MRI-R2: Development of Instrumentation for Nanoscale Spatial and Time Resolved Microwave Studies at Variable Temperatures and Magnetic Fields

技术摘要：该合同是根据2009年美国复苏和再投资法案（公法111-5）资助的。该项目旨在为西北大学凝聚态物质和材料物理学的各种实验开发一个低温、时间、频率和空间分辨射频和微波测量设备。项目期间将进行四组实验：研究介观器件中的互相关噪声；纳米级铁磁体的磁化动力学；半导体器件中Luttinger液体的飞行时间测量；以及正常金属中持续的电流。然而，这个新设备的用途将远远超出这些最初的实验，涉及西北大学的其他研究小组，并使西北大学的研究小组能够积极地将高频技术纳入他们未来的实验研究计划。它还将使西北大学的本科生、研究生和博士后熟悉无线电和微波频率技术，这一技能在学术界和工业界都变得越来越重要。摘要：该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。电子电路的日益小型化使快速计算机和超薄手机得以发展，同时也伴随着使这些设备工作更小更快的愿望。将器件元件的尺寸缩小到纳米尺度——一米的十亿分之一——在一纳秒或更短的时间尺度上研究它们的行为提出了新的实验挑战，时间尺度对尖端电子器件越来越重要。这个项目致力于开发仪器来研究纳米材料在几兆赫兹频率下的行为，这是目前最快的台式计算机运行的频率，到几十兆赫兹。除了提供制造下一代纳米级高频设备的更好方法之外，即将开发的仪器将使实验探索高频的基本量子现象成为可能，并在此过程中训练下一代科学家和工程师掌握这些基本技术。

0960120ChandrasekharNorthwestern U.Technical Summary: This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). This project is for the development of a facility to enable low-temperature, time-, frequency- and spatially-resolved radiofrequency and microwave measurements for a wide variety of experiments in condensed matter and materials physics at Northwestern University. Four sets of experiments will be attempted during the project period: investigation of cross-correlation noise in mesoscopic devices; magnetization dynamics of nanoscale ferromagnets; time-of-flight measurements in Luttinger liquids in semiconductor devices; and persistent currents in normal metals. However, the usefulness of this new facility will extend far beyond these initial experiments, involving other groups at Northwestern, and enabling research groups at Northwestern to actively incorporate high-frequency techniques in their future experimental research plans. It will also allow undergraduate and graduate students and post-docs at Northwestern to gain familiarity with radio and microwave frequency techniques, a skill that is becoming increasing important in both academia and industry.Non-Technical Abstract:This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). The increasing miniaturization of electronic circuitry that allows the development of fast computers and slim cell phones is also accompanied by a desire to make these devices work even smaller and faster. Reducing the size of device elements to the scale of nanometers--one billionth the size of a meter--presents new experimental challenges in trying to study their behavior at time scales of a nanosecond or shorter, time scales that are increasingly important for cutting-edge electronic devices. This project is devoted to developing instrumentation to study the behavior of nanoscale materials at frequencies starting at a few gigahertz, the frequencies at which the current fastest desktop computers operate, to a few tens of gigahertz. In addition to providing insight into better ways to make the next generation of nanoscale, high-frequency devices, the instrumentation that will be developed will enable experiments exploring fundamental quantum phenomena at high frequency, and in the process train the next generation of scientists and engineers in these essential techniques.