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Tunable Terahertz Plasmon-Induced Transparency in Resonator-Coupled Dirac Semimetal Waveguides

机译:调谐太赫兹等离子体诱导的谐振器耦合Dirac半型波导透明度

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摘要

The bulk Dirac semimetal (BDS) is an interesting material, similar to graphene, which can dynamically adjust its optical properties via a variation in its Fermi energy or electrical voltage. In this work, a BDS-based plasmonic device, which enables tunable terahertz plasmon-induced transparency, was proposed and designed. By using the finite element method, the surface plasmon polariton and plasmon-induced transparency of this device were systematically investigated. The results demonstrate that the plasmon-induced transparency of such device can be dynamically tuned by varying its Fermi energy. When the Fermi energy changes from 55 meV to 95 meV, the maximum group delay time of the device increases from 13.2 ps to 21 ps. In the case of a cascading device, the maximum group delay time can be further pushed up to 44.57 ps. The influence of the ambient refractive index on the optical properties of the proposed device was also considered and investigated.
机译:散装Dirac半型(BDS)是一种有趣的材料,类似于石墨烯,其可以通过其费米能量或电压的变化动态调节其光学性质。 在这项工作中,提出并设计了一种能够调谐的太赫兹等离子体诱导的透明度的BDS基于BDS的等离子体装置。 通过使用有限元方法,系统地研究了该装置的表面等离子体和等离子体诱导的透明度。 结果表明,通过改变其费米能量,可以动态地调整这种装置的等离子体诱导的透明度。 当FERMI能量从55 MEV变为95 MEV时,器件的最大组延迟时间从13.2 ps增加到21 ps。 在级联设备的情况下,最大组延迟时间可以进一步推动高达44.57 ps。 还考虑并研究了和研究了环境折射率对所提出的装置的光学性质的影响。

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