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Tunable Fabry-Perot resonators with embedded graphene from terahertz to near-infrared frequencies

机译:具有从太赫兹到近红外频率的嵌入式石墨烯的可调谐Fabry-Perot谐振器

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摘要

Fabry-Perot resonators with inserted graphene are proposed for efficient reflectance modulation from terahertz to near-infrared frequencies. The resonators' structure is simple and consists of the Bragg top mirror, the cavity with the graphene, and the metallic bottom mirror. Reflectance from the cavities is electrically controlled by adjusting the Fermi level in the graphene. At near-infrared and terahertz frequencies, the amplitude modulation of the reflectance is dominant. On the other hand, tuning at mid-infrared frequencies is based on the spectral modulation of cavity resonances. By the impedance matching of resonators to a surrounding medium, the achieved insertion loss and modulation depth approach zero and 100%, respectively.
机译:提出了具有插入石墨烯的Fabry-Perot谐振器,用于从太赫兹到近红外频率的有效反射率调制。谐振器的结构很简单,由布拉格顶部反射镜,带有石墨烯的空腔和金属底部反射镜组成。通过调节石墨烯中的费米能级,可电气控制腔体的反射率。在近红外和太赫兹频率下,反射率的幅度调制是主要的。另一方面,在中红外频率进行调谐是基于腔共振的频谱调制。通过谐振器与周围介质的阻抗匹配,实现的插入损耗和调制深度分别接近零和100%。

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