CAREER: Integrated Research and Education on Hot Carrier Effects in Plasmonics

职业：等离子体激元热载流子效应的综合研究和教育

• 批准号: 2006102
• 负责人: Jeremy Munday
• 金额: $ 10.76万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-09-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2006102&HistoricalAwards=false
• 关键词: CAREER; Integrated; Research; Education; Hot

Abstract This CAREER award is jointly funded by the Electronics, Photonics, and Magnetic Devices Program (EPMD) in the Division of Electrical, Communications and Cyber Systems (ECCS) and by the Electronic and Photonic Materials Program (EPM) in the Division of Materials Research (DMR).NonTechnical: Nearly all modern technology, from cell phones and cameras to medical sensors, involves the interaction of light with electronic circuitry in order to perform specific functions. When light is absorbed in such a device, it can create electrons with more energy than needed to execute the desired function, so-called hot-electrons, which generally dissipate this energy as heat, resulting in power loss and device inefficiency. The first goal of this project is to advance the understanding of these hot-electrons, which will enable devices with unprecedented functionality and performance that can be applied to problems of global importance, e.g. solar energy generation, wireless communication, etc. The second goal of this project is to integrate the research into education by creating a suite of online learning tools for widespread dissemination of ideas and techniques in alternative energy. In conjunction with these online resources, this program will provide educational support to a wide range of audiences including the general community through public outreach and the mentoring of graduate, undergraduate and high school students.Technical: Ohmic loss is one of the major hindrances to high efficiency plasmonic devices due to energy dissipation of excited charge carriers within the metal. A similar effect, known as thermalization, also limits photovoltaic efficiency in solar energy devices. It is thus important to understand and mitigate these various loss mechanisms in next-generation optoelectronic devices. Through this program the PI will investigate the optoelectronic properties of fabricated structures capable of generating and extracting these carriers before heat dissipation occurs. These studies will encompass light absorption, carrier generation and collection, as well as material and surface interface engineering to modify energy barrier heights, leading to a new understanding of how hot electronic processes work in plasmonic nanostructures. This knowledge will be applied to a novel class of plasmonic devices based on hot carriers, which enable simultaneous control of optical and electronic properties.

该职业奖由电气、通信和网络系统部（ECCS）的电子、光子学和磁性器件项目（EPMD）和材料研究部（DMR）的电子和光子材料项目（EPM）共同资助。非技术：几乎所有的现代技术，从手机和相机到医疗传感器，都涉及光与电子电路的相互作用，以实现特定的功能。当光被这种设备吸收时，它可以产生比执行所需功能所需的能量更多的电子，即所谓的热电子，这些电子通常以热的形式消耗这些能量，导致功率损失和设备效率低下。该项目的第一个目标是推进对这些热电子的理解，这将使具有前所未有的功能和性能的设备能够应用于具有全球重要性的问题，例如太阳能发电，无线通信等。该项目的第二个目标是通过创建一套在线学习工具，将研究与教育相结合，以广泛传播替代能源的思想和技术。与这些在线资源相结合，该项目将通过公共宣传和对研究生、本科生和高中生的指导，为包括普通社区在内的广泛受众提供教育支持。技术：由于金属内部受激载流子的能量耗散，欧姆损耗是高效等离子体器件的主要障碍之一。一个类似的效应，被称为热化，也限制了太阳能设备的光电效率。因此，在下一代光电器件中理解和减轻这些不同的损耗机制是很重要的。通过该计划，PI将研究能够在散热发生之前产生和提取这些载流子的制造结构的光电特性。这些研究将包括光吸收，载流子产生和收集，以及材料和表面界面工程来修改能量势垒高度，从而对等离子体纳米结构中的热电子过程如何工作有新的理解。这些知识将应用于一类基于热载流子的新型等离子体器件，它可以同时控制光学和电子特性。