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: 1554503
• 负责人: Jeremy Munday
• 金额: $ 50万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-01-15 至 2020-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1554503&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.

本CAREER奖由电气、通信和网络系统部（ECCS）的电子、光子学和磁器件计划（EPMD）以及材料研究部（DMR）的电子和光子材料计划（EMPM）共同资助。非技术性：几乎所有的现代技术，从手机和相机到医疗传感器，涉及光与电子电路的相互作用以执行特定功能。当光在这样的设备中被吸收时，它可以产生具有比执行所需功能所需的能量更多的能量的电子，即所谓的热电子，其通常将这种能量作为热量耗散，导致功率损耗和设备效率低下。该项目的第一个目标是促进对这些热电子的理解，这将使设备具有前所未有的功能和性能，可应用于全球重要问题，例如太阳能发电，无线通信，该项目的第二个目标是通过创建一套在线学习工具，将研究融入教育中，以便广泛传播替代能源结合这些在线资源，该计划将提供教育支持，以广泛的受众，包括一般社区通过公共宣传和指导研究生，本科生和高中生。技术：欧姆损失是一个主要的障碍，以高效率的等离子体激元器件由于能量耗散的激发电荷载流子在金属。类似的效应，称为热化，也限制了太阳能设备的光伏效率。因此，重要的是要了解和减轻这些各种损失机制，在下一代光电子器件。通过这个项目，PI将研究制造结构的光电特性，这些结构能够在散热发生之前产生和提取这些载流子。 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，以修改能量势垒高度，从而对等离子体纳米结构中的热电子过程如何工作有了新的认识。这些知识将被应用到一类新的等离子体激元器件的基础上的热载流子，使光学和电子性能的同时控制。