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Tunable high-channel-count bandstop graphene plasmonic filters based on plasmon induced transparency

机译:基于等离子体诱导透明度的可调谐高通道计数Bangrestop石墨烯滤波器

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摘要

A high-channel-count bandstop graphene plasmonic filter based on ultracompact plasmonic structure is proposed in this paper. It consists of graphene waveguide side-coupled with a series of graphene filtering units. The study shows that the waveguide-resonator system performs a multiple plasmon induced transparency (PIT) phenomenon. By carefully adjusting the Fermi level of the filtering units, any two adjacent transmitted dips which belong to different PIT units can produce coherent coupling superposition enhancement. This property prevents the attenuation of the high-frequency transmission dips of multiple PIT and leads to an excellent bandstop filter with multiple channels. Specifically, the bandwidth and modulation depth of the filters can be flexibly adjusted by tuning the Fermi energy of the graphene waveguide. This ultracompact plasmonic structure contributes to the achievement of frequency division multiplexing systems for optical computing and communications in highly integrated optical circuits.
机译:本文提出了一种基于超自联等离子体结构的高通道计数带电池石墨烯等级滤波器。它包括与一系列石墨烯过滤单元侧耦合的石墨烯波导。该研究表明,波导 - 谐振器系统执行多重等离子体诱导的透明度(凹坑)现象。通过仔细调整过滤单元的FERMI水平,属于不同凹坑单元的任何两个相邻的传输芯片都可以产生相干耦合叠加增强。该属性可防止多个坑的高频传输芯片衰减,并导致具有多个通道的优异带脚滤波器。具体地,可以通过调谐石墨烯波导的费米能量来灵活地调整滤波器的带宽和调制深度。这种超自然等离子体结构有助于实现高度集成光电路中的光学计算和通信的频分复用系统的实现。

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