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首页> 外文期刊>Optics Letters >Flexible terahertz modulator based on coplanar-gate graphene field-effect transistor structure
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Flexible terahertz modulator based on coplanar-gate graphene field-effect transistor structure

机译：基于共面栅石墨烯场效应晶体管结构的柔性太赫兹调制器

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The terahertz (THz) modulators, as an essential component of the THz system, have been developed by many efforts until now. However, the development of flexible THz modulators is hindered due to the lack of flexible THz modulating materials. Herein, for the first time to the best of our knowledge, we demonstrated the feasibility of flexible THz modulators based on the coplanar-gate field-effect transistor (FET) structure of ion-gel/graphene/polyethylene terephthalate. The THz transmittance through this THz graphene modulator can be well controlled with a modulation depth up to 22% by tuning the carrier concentration of graphene via electrical gating. Furthermore, because of the integration of high flexibilities of graphene, ion-gel, and polyethylene terephthalate (PET), the proposed THz graphene modulator shows superior flexible performance, where the modulation properties can be maintained almost unchanged, not only under bending deformations, but also before and after bending 1000 times. In addition, due to the unique structure of ion-gel/graphene/PET, the flexible THz graphene modulator has a low insertion loss (1.2 dB). Therefore, this Letter is expected to be beneficial for the potential applications, ranging from the traditional compact THz system to a new flexible THz technology. (C) 2016 Optical Society of America
机译：太赫兹（THz）调制器作为太赫兹系统的重要组成部分，到目前为止已经进行了许多努力。但是，由于缺乏柔性太赫兹调制材料，阻碍了柔性太赫兹调制器的发展。在此，我们首次据我们所知，展示了基于离子凝胶/石墨烯/聚对苯二甲酸乙二酯的共面栅场效应晶体管（FET）结构的柔性THz调制器的可行性。通过电选通调节石墨烯的载流子浓度，可以很好地控制通过此THz石墨烯调制器的THz透射率，调制深度高达22％。此外，由于集成了石墨烯，离子凝胶和聚对苯二甲酸乙二酯（PET）的高柔韧性，因此提出的THz石墨烯调制器显示出优异的柔韧性，不仅在弯曲变形下，而且在弯曲变形下，调制性能也几乎保持不变。前后弯曲1000次。此外，由于离子凝胶/石墨烯/ PET的独特结构，柔性THz石墨烯调制器具有低插入损耗（1.2 dB）。因此，从传统的紧凑型THz系统到新型的灵活THz技术，该信函有望对潜在的应用带来好处。 （C）2016美国眼镜学会

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