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Room Temperature Tunable Plasmonic-Enhanced Graphene Terahertz Photodetectors

Room Temperature Tunable Plasmonic-Enhanced Graphene Terahertz Photodetectors
室温可调谐等离子体增强石墨烯太赫兹光电探测器
批准号:
1309750
负责人:
Thomas Murphy
金额:
$36.0万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2013
资助国家:
美国
项目状态:
已结题
起止时间:
2013-07-15 至 2017-06-30

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英文摘要
Objective: The proposed research seeks to develop a new type of graphene photodetector that operates at room temperature and exploits plasmonic resonances to achieve tunable spectral sensitivity throughout the terahertz spectral regime.Intellectual Merit: Graphene is a unique two-dimensional material that has the potential to transform the field of terahertz and infrared photonics. Favorable thermoelectric transport properties, including low specific heat and weak electron-phonon interaction allow for sensitive detection and ultrafast response time in graphene devices. While a single layer of graphene can yield a small, but measurable photoabsorption, structured graphene films can support collective plasmonic excitations that show a far greater photoabsorption, at a resonance frequency that can be electrically tuned through the application of a gate voltage. The device concept proposed here could lead to a transformative advances in terahertz photonics, by enabling tunable room-temperature sensitivity and noise performance that is orders of magnitude superior to existing detector technologies.Broader Impact: Practical room temperature terahertz photodetection could have far reaching impact in a number of key sectors ranging from pharmaceutical development to homeland security and medical imaging, and could spur the development of a robust terahertz technology. Furthermore, we propose a new outreach activity that would introduce young scientists from developing countries to new economical techniques for advanced signal recovery.
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