摘要
石墨烯是一种零带隙二维的半导体材料,具有极高的载流子迁移率,优异的机械、电学、热学和光学等性能.在太赫兹辐射源、调制器和探测器件的研究中,石墨烯材料具有独特的优势.本文以石墨烯材料在太赫兹辐射源、调制器以及探测器等器件方面的应用为主,综述了石墨烯太赫兹器件的最新研究进展.
Graphene has unique electronic properties stemming from a linear gapless carrier energy spectrum, and has dominant advantages in the research of devices such as lasers, detectors and modulators in terahertz region due to its tunable energy gap and extremely high carrier mobility. In this review, we summarize its latest progress in applications of terahertz devices such as lasers, detectors and modulators. Terahertz lasers based on graphene can reach a gain as high as 10^4 cm^-1, and terahertz detectors with different structures such as a bilayer graphene field-effect transistor with top gate and buried gate can achieve NEP （noise equivalent power） ～ nW/Hz. Graphene terahertz modulators, which are equipped with transmission configuration and reflection configuration, can have a very high modulation depth. These results may be helpful for developing the high-efficiency graphene terahertz devices.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2015年第22期39-47,共9页
Acta Physica Sinica
基金
国家重点基础研究发展计划(批准号:2014CB339803)
国家自然科学基金(批准号:61131006
61321492
61306066)
国家重大科学仪器设备开发专项(批准号:2011YQ150021)
国家科技重大专项(批准号:2011ZX02707)
中国科学院重要方向项目(批准号:YYYJ-1123-1)
中国科学院创新团队国际合作伙伴计划:"高迁移率材料工程"创新团队项目
上海市科学技术委员会(批准号:14530711300
13ZR1464600)资助的课题~~
