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arXiv 1107.4176cond-mat.mtrl-scicond-mat.mes-hall
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石墨烯中光电压的强等离子体增强

Strong Plasmonic Enhancement of Photovoltage in Graphene

T. J. Echtermeyer, L. Britnell, P. K. Jasnos, A. Lombardo, R. V. Gorbachev, A. N. Grigorenko, A. K. Geim, A. C. Ferrari, K. S. Novoselov

摘要:

在石墨烯广泛的潜在应用中,从晶体管和化学传感器到纳米机电设备和复合材料,光子学和光电子学领域被认为是最有前途的领域之一。事实上,石墨烯对于高速光电探测的适用性在以10 Gbit/s \cite运行的光通信链路中得到了证明。然而,与传统的基于III-V族的光电探测器相比,基于石墨烯的光电探测器的低响应度是潜在的缺点。在这里,我们表明,通过将石墨烯与等离子体纳米结构相结合,由于pn结区域中的场集中,基于石墨烯的光电探测器的效率可以提高高达20倍。此外,波长和偏振选择性可以采用不同几何形状的纳米结构来实现。

英文摘要:

Amongst the wide spectrum of potential applications of graphene, ranging from transistors and chemical-sensors to nanoelectromechanical devices and composites, the field of photonics and optoelectronics is believed to be one of the most promising. Indeed, graphene's suitability for high-speed photodetection was demonstrated in an optical communication link operating at 10 Gbit/s\cite. However, the low responsivity of graphene-based photodetectors compared to traditional III-V based ones is a potential drawback. Here we show that, by combining graphene with plasmonic nanostructures, the efficiency of graphene-based photodectors can be increased by up to 20 times, due to field concentration in the area of a p-n junction. Additionally, wavelength and polarization selectivity can be achieved employing nanostructures of different geometries.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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