论文标题
片上超快的等离子石墨烯热电子辐射光电探测器
On-chip ultrafast plasmonic graphene hot electron bolometric photodetector
论文作者
论文摘要
我们研究了基于热载流子光效效应的波导集成等离子石墨烯光电探测器的运行，该效应的特征是在数百个AW-1的尺度上具有很高的响应性，而GHz的尺度上的高速度则具有高速度。我们开发了辐射效应的理论，该理论源自石墨烯的条带非副代谢，并显示出降压效应引起的响应性，显示出显着超过共存光导电效应的响应性，从而令人信服地证明了侧列效果的优势。基于理论，我们提出了一种基于杂交波导的新型检测器构型，该构型可在短距离内有效地吸收石墨烯，随后发生了很大的电导率变化。结果证明了石墨烯对高速通信系统的潜力。
We investigate waveguide-integrated plasmonic graphene photodetector operating based on the hot carrier photo-bolometric effect, which is characterized simultaneously by high responsivity on the scale of hundreds of AW-1 and high speed on the scale of 100s of GHz. We develop a theory of bolometric effect originating from the band nonparabolicity of graphene and estimate responsivity due to bolometric effect is shown to significantly surpass the responsivity of co-existing photo-conductive effect thus convincingly demonstrating the dominance of bolometric effect. Based on the theory we propose a novel detector configuration based on hybrid waveguide that allows for efficient absorption in the graphene over short distance and subsequently a large change of conductivity. The results demonstrate the potential of graphene for high-speed communication systems.
