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兰州大学机构库  > 物理科学与技术学院  > 期刊论文
题名: Graphene plasmonics for tunable terahertz metamaterials
作者: Ju, L; Geng, BS(耿柏松); Horng, J; Girit, C; Martin, M; Hao, Z; Bechtel, HA; Liang, XG; Zettl, A; Shen, YR; Wang, F
收录类别: SCIE
出版日期: 2011-09
刊名: NATURE NANOTECHNOLOGY
卷号: 6, 期号:10, 页码:630-634
英文摘要: Plasmons describe collective oscillations of electrons. They have a fundamental role in the dynamic responses of electron systems and form the basis of research into optical metamaterials(1-3). Plasmons of two-dimensional massless electrons, as present in graphene, show unusual behaviour(4-7) that enables new tunable plasmonic metamaterials(8-10) and, potentially, optoelectronic applications in the terahertz frequency range(8,9,11,12). Here we explore plasmon excitations in engineered graphene microribbon arrays. We demonstrate that graphene plasmon resonances can be tuned over a broad terahertz frequency range by changing micro-ribbon width and in situ electrostatic doping. The ribbon width and carrier doping dependences of graphene plasmon frequency demonstrate power-law behaviour characteristic of two-dimensional massless Dirac electrons(4-6). The plasmon resonances have remarkably large oscillator strengths, resulting in prominent room-temperature optical absorption peaks. In comparison, plasmon absorption in a conventional two-dimensional electron gas was observed only at 4.2 K (refs 13,14). The results represent afirst look at light-plasmon coupling in graphene and point to potential graphene-based terahertz metamaterials.
作者部门: [Ju, Long ; Geng, Baisong ; Horng, Jason ; Girit, Caglar ; Zettl, Alex ; Shen, Y. Ron ; Wang, Feng] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA ; [Martin, Michael ; Hao, Zhao ; Bechtel, Hans A.] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source Div, Berkeley, CA 94720 USA ; [Hao, Zhao] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Earth Sci, Berkeley, CA 94720 USA ; [Liang, Xiaogan] Univ Calif Berkeley, Lawrence Berkeley Lab, Mol Foundry, Berkeley, CA 94720 USA ; [Zettl, Alex ; Shen, Y. Ron ; Wang, Feng] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA ; [Geng, Baisong] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China
通讯作者: Wang, F (reprint author), Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
学科分类: Science & Technology - Other Topics;Materials Science
文章类型: Article
所属项目编号: Office of Naval Research MURI [N00014-09-1066] ; Office of Basic Energy Sciences, US Department of Energy [DE-AC02-05CH11231] ; William Packard fellowship ; Hellman family fellowship ; Lam fellowship
所属项目名称: 美国能源部项目
项目资助者: US DOE
语种: 英语
DOI: 10.1038/NNANO.2011.146
ISSN号: 1748-3387
WOS记录号: WOS:000295923800010
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/105388
Appears in Collections:物理科学与技术学院_期刊论文

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Recommended Citation:
Ju, L,Geng, BS,Horng, J,et al. Graphene plasmonics for tunable terahertz metamaterials[J]. NATURE NANOTECHNOLOGY,2011,6(10):630-634.
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