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.

该项目由电气、通信和网络系统部（ECCS）的电子、光子学和磁性器件（EPMD）项目和材料研究部（DMR）的电子和光子材料（EPM）项目共同资助。该计划的目标是研究主动控制石墨烯纳米带阵列的电光特性，目标是实现带隙的原位应变可调性，用于覆盖超宽光谱范围的红外探测器。智力上的优点是，计划中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，这是由于整个光电流产生的肖特基障碍。此外，具有明确边缘手性的石墨烯纳米带的受控驱动为了解锯齿形和扶手形边缘的外加应力、带隙开口和红外吸收之间的关系提供了重要的见解。所提出的设备可以检测波长范围内的太赫兹辐射，其效率与辐射热计相似，但速度更快，波长灵活。更广泛的影响是，所提出的设备概念的演示可以实现广泛的应用，包括雾环境中的高速通信、光学互连、太赫兹探测、成像、遥感和光谱学。计划中的教育举措为科学和工程专业的学生提供培训，特别侧重于与工程领域的妇女计划和倡导者网络以及工程领域的少数民族国家行动委员会合作，招募和指导来自代表性不足的少数民族的学生。该项目还将与史蒂文斯大学的科学与工程教育创新中心合作，将这一努力扩展到K-12的推广工作。