We demonstrate a terahertz intensity modulator using a graphene supercapacitor which consists of two large-area graphene electrodes and an electrolyte medium. The mutual electrolyte gating between the graphene electrodes provides very efficient electrostatic doping with Fermi energies of 1 eV and a charge density of 8 x 10(13) cm(-2). We show that the graphene supercapacitor yields more than 50% modulation between 0.1 and 1.4 THz with operation voltages less than 3 V. The low insertion losses, high modulation depth over a broad spectrum, and the simplicity of the device structure are the key attributes of graphene supercapacitors for THz applications. (C) 2015 Optical Society of America
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机译:我们演示了使用由两个大面积石墨烯电极和电解质介质组成的石墨烯超级电容器的太赫兹强度调制器。石墨烯电极之间的相互电解质门控提供非常有效的静电掺杂,费米能量为1 eV,电荷密度为8 x 10(13)cm(-2)。我们表明,石墨烯超级电容器在0.1至1.4 THz的工作电压小于3 V的情况下可产生超过50%的调制。低插入损耗,宽调制范围内的高调制深度以及器件结构的简单性是该器件的关键特性。用于太赫兹应用的石墨烯超级电容器。 (C)2015年美国眼镜学会
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