Enhanced broadband wide-angle light-graphene interactions in visible wavelengths assisted by nanoporous gold structure

Enhanced broadband wide-angle light-graphene interactions in visible wavelengths assisted by nanoporous gold structure
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纳米多孔金结构辅助增强可见光波长下的宽带广角光-石墨烯相互作用

DOI:
10.1063/1.4879016
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发表时间:
2014-05
影响因子:
4
通讯作者:
Liu, F.
Liu, F.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Hao, Y.;Zhao, X.;Song, C.;Chen, L.;Shi, W.;Liu, F.

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我们的实验表明,增强的光-石墨烯相互作用的辅助下,在双连续结构的纳米多孔金(NPG)薄膜在可见光波长的表面等离子体。与这种非晶金属结构的耦合使得石墨烯的宽带和广角吸收增强成为可能。在垂直入射下的平均吸收增强比原始石墨烯的平均吸收增强大一个数量级,为25.6%。此外,NPG膜表面附近的强近电场极大地促进了石墨烯的拉曼散射,对于514.5-或632.8-nm激光激发高达一个数量级。我们的研究表明,NPG薄膜是一个很有前途的平台,在石墨烯集成应用在可见光区,如光电探测器和光捕获设备。
We experimentally demonstrate enhanced light-graphene interactions aided by the surface plasmons sustained in bicontinuous structure of nanoporous gold (NPG) film in visible wavelengths. Coupling with such amorphous metallic structure enables broadband and wide-angle absorption enhancement of graphene. The average absorption enhancement at normal incidence is at one-order of magnitude larger than that of pristine graphene, to be 25.6%. In addition, the strong near electric fields at the surface proximity of NPG film greatly promote the Raman scattering of graphene up to one order of magnitude for either 514.5- or 632.8-nm laser excitation. Our study shows that NPG film is a promising platform in graphene-integrated applications in visible regime such as photodetectors and light-harvesting devices.
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