RUI: Nanoscale 3-D Thermal Profiling Inside Optoelectronic Devices

光电子器件内部的纳米级3D热分析0621735贾尼斯·哈金斯，芒特霍利奥克学院智力优势。改进的热工程对于改善光电子器件的工作特性和寿命至关重要，而光电子器件是波分复用和高速通信网络等光子学应用的核心。然而，传统的宏观理论往往不能准确地预测在微米或纳米尺度上设计的器件的热行为。同样，对纳米结构光电子器件中极其复杂的热产生和传输过程的实验探索也是具有挑战性的，这在很大程度上是因为主要热源往往深埋在这些器件中。这里提出的工作将首次实现对操作设备内部深处温度的高分辨率实验测量，从而为光电子器件的热工程做出巨大贡献。我们将开发一种共焦热反射技术来测量三维温度分布，空间分辨率为150 nm(横向)和550 nm(垂直)，以及10-25mK的热分辨率。与商用红外显微镜相比，这是空间分辨率提高了一个数量级，热分辨率提高了两个数量级。对操作装置内和边界处的热分布的高分辨率实验测量将与复杂异质结构装置内的热产生和传输的详细理论模型相结合。拟议的最先进的共聚焦热反射技术将使我们能够实现以下三项技术进步：a)运行中的光电设备内部的非侵入性、3-D热成像；b)分析复杂光电设备中的热传输；以及c)确定同质结和异质结构设备中的内部热产生机制。广泛影响：该提议将通过创建高分辨率纳米级热成像的新设施，显著增强Mt Holyoke学院的研究和教学基础设施。这一机制将导致与国际和行业合作的新伙伴关系，并加强我们与马萨诸塞大学阿默斯特分校现有的当地5-College网络的参与。此外，该提案将研究与教育相结合：6-8名本科生女性将与PI和一名5所学院的博士后研究员合作开展这一项目。Mt.Mt.霍利奥克特别重视将尖端研究融入下一代女科学家和工程师的教育中，因此本科生将大量参与拟议研究的所有方面。最后，由于霍利约克山是一所女子学院，学生群体异乎寻常地多样化，而国际学生联合会积极参与了一系列活动，以使获得科学的机会多样化，因此，拟议的研究提供了一个极好的机会，可以扩大未被充分代表的学生对科学的参与。

Nanoscale 3D thermal profiling inside optoelectronic devices0621735Janice Hudgings, Mount Holyoke CollegeIntellectual Merit. Improved thermal engineering is critical to improving the operating characteristics and lifetimes of optoelectronic devices that are central to photonics applications such as wavelength division multiplexed and high-speed communications networks. However, conventional macroscopic theory often cannot accurately predict thermal behavior in devices engineered on the micro- or nano-scale. Likewise, experimental exploration of the remarkably complex heat generation and transport processes in nano-structured optoelectronic devices is also challenging, in large part because the primary heat sources are often buried deep within these devices. The work proposed here will provide a dramatic contribution to thermal engineering of optoelectronic devices by enabling for the first time high-resolution experimental measurements of temperatures deep within an operating device. We will develop a confocal thermoreflectance technique to measure 3-D temperature profiles with spatial resolutions on the order of 150nm (lateral) and 550nm (vertical), along with 10-25mK thermal resolution. This is an order of magnitude better spatial resolution and a two order of magnitude improvement in thermal resolution relative to commercial IR microscopes. High resolution experimental measurements of the thermal distribution both within operating devices and also at the boundaries will be combined with detailed theoretical modeling of heat generation and transport within complex heterostructured devices. The proposed state of the art, confocal thermoreflectance technique will enable us to achieve the following three technological advances: a) non-invasive, 3-D thermal profiling inside operating optoelectronic devices; b) analyze heat transport in complex optoelectronic devices; and c) determine mechanisms for internal heat generation in homojunctions and heterostructured devices.Broader impact: This proposal will significantly enhance the infrastructure for research and education at Mt Holyoke College, by creating a novel facility for high-resolution, nanoscale thermal imaging. This facility will lead to new partnerships with both international and industrial collaborations, as well as strengthening our participation in the existing local 5-College network with the University of Massachusetts at Amherst. Furthermore, the proposal integrates research with education: 6-8 undergraduate women will work on this project, in collaboration with the PI and a 5-College postdoctoral researcher. Mt. Holyoke places a particular premium on the integration of cutting-edge research into the education of the next generation of women scientists and engineers, so undergraduates will be heavily involved in all aspects of the proposed research. Finally, because Mt Holyoke is a women's college with an unusually diverse student body and the PI is heavily involved in a number of activities to diversify access to the sciences, the proposed research comprises a remarkable opportunity to broaden the participation of underrepresented students in science.