周期掺杂石墨烯条带激发表面激元极化波的研究
首发时间:2014-04-28
摘要:石墨烯在中、远红外波段能够支持表面等离子激元极化(Surface Plasmon Polariton, SPP)波,表面波可以突破衍射极限,为实现亚波长的光电器件以及全光电集成电路提供了可能。相比金属上的表面波,石墨烯上的表面波束缚性更强,同时石墨烯的电导率具有很大的可调范围,通过化学掺杂、外加电压、介质都可以实现石墨烯表面波传输特性的控制。由于石墨烯上表面波的传播常数比自由空间的传播常数大很多,在石墨烯上激发表面波比较困难。本文通过数值仿真对周期掺杂石墨烯条带激发表面波进行了研究,通过改变周期结构的参数可以调控透射谱的深度和谐振频率,为进一步研究石墨烯表面波的传输和应用打下基础。?????
关键词: 石墨烯 表面等离子激元极化波 激发 周期掺杂石墨烯条带
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Study of the excitation of surface plasmon polariton wave using periodic doped graphene ribbons
Abstract:Graphene can support the surface plasmon polariton (SPP) wave in the mid and far infrad range. SPP wave can break the diffraction limit thus provide the possibility for highly compact micro-nano integrated circuit. Compared with the SPP wave on the metal, the graphene SPP wave have stronger confinement and can be tuned through chemical doping, static voltage and dielectrics. However, the wave vector of the graphene SPP wave is much larger than that in the free space. It's difficult to excite the SPP wave on the graphene. In this paper, excitation of the SPP wave using periodic doped graphene ribbons is studied by numerical simulation. Further investigations reveal the depth and resonance frequency of the transmission spectrum can be tuned by changing the periodic structure's parameters.?????
Keywords: graphene surface plasmon polariton wave excitation periodic doped graphene ribbons
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No.4594308973079139****
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