Bandgap-Tunable Graphene Nanoribbons for High Speed, Ultra-Wide-Band Photodetectors

用于高速、超宽带光电探测器的带隙可调石墨烯纳米带

• 批准号: 1104870
• 负责人: Eui-Hyeok Yang
• 金额: $ 37.5万
• 依托单位: Stevens Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-08-01 至 2015-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1104870&HistoricalAwards=false
• 关键词: Bandgap; Tunable; Graphene; Nanoribbons; Speed

This project is jointly funded by the Electronics, Photonics, and Magnetic Devices (EPMD) Program in the Division of Electrical, Communications and Cyber Systems (ECCS) and the Electronic and Photonic Materials (EPM) Program in the Division of Materials Research (DMR).The objective of this program is to investigate the electro-optical properties of actively controlled graphene nanoribbon arrays with the goal to enable in-situ strain tunability of the bandgap for applications in infrared detectors covering an ultra-wide spectral range.The intellectual merit is that the planned experiments provide new insights into the interplay between thermoelectric effects and built-in electric fields due to the Schottky barriers to the overall photocurrent generation. Furthermore, the controlled actuation of graphene nanoribbons with well defined edge chirality provides important insights into the relation between applied stress, band gap opening, and infrared absorption, for zigzag and armchair edges. The proposed device can detect terahertz radiation over a wavelength range with efficiencies similar to bolometers, but at much higher speed and with wavelength agility.The broader impacts are that demonstration of the proposed device concept can enable a wide range of applications including high-speed communication in foggy environments, optical interconnects, terahertz detection, imaging, remote sensing, and spectroscopy. The planned educational initiatives provide training for students in science and engineering with a special focus on recruiting and mentoring students from under-represented minorities in partnership with the Women in Engineering Program and Advocates Network and the National Action Council for Minorities in Engineering. The program will also work with the Center for Innovation in Science and Engineering Education at Stevens to extend this effort to K-12 outreach endeavors.

This project is jointly funded by the Electronics, Photonics, and Magnetic Devices (EPMD) Program in the Division of Electrical, Communications and Cyber​​ Systems (ECCS) and the Electronic and Photonic Materials (EPM) Program in the Division of Materials Research (DMR).The objective of this program is to investigate the electro-optical properties of actively controlled graphene nanoribbon arrays with the goal to enable in-situ strain tunability of the bandgap对于涵盖超宽光谱范围的红外探测器的应用。智力优点是，由于索特基（Schottky）的整体光电流产生障碍，计划的实验为热电效应和内置电场之间的相互作用提供了新的见解。此外，具有良好定义的边缘手性的石墨烯纳米容器的受控致动提供了有关曲折和扶手椅边缘的施加应力，带隙打开和红外吸收之间关系的重要见解。所提出的设备可以在波长范围内检测到具有类似于验证剂的效率的波长范围内，但是以更高的速度和波长的敏捷性，更广泛的影响是，提出的设备概念的证明可以实现广泛的应用，包括在雾气环境中，包括雾气环境中的高速通信，光学互连，光学互连，tereconconcrasts，terectrasts，terection，terection，terection and Section and Section，questrys，questions，questions andymection，questrys，spectressprys，questrys，questive and Implecters，questive and Imakeptrys，图像。计划的教育计划为科学和工程学的学生提供了培训，特别着重于招募和指导来自代表性不足的少数民族的学生，与工程课程的女性和倡导者网络和国家工程少数民族委员会合作。该计划还将与史蒂文斯的科学与工程教育创新中心合作，将这项工作扩展到K-12外展活动。