论文标题
等离激元天线偶联与双曲线声子 - 两极，用于敏感和快速的中红外光电烯
Plasmonic antenna coupling to hyperbolic phonon-polaritons for sensitive and fast mid-infrared photodetection with graphene
论文作者
论文摘要
整合和操纵范德华异质结构的纳米 - 原始特性可以实现前所未有的平台进行光电检测和传感。红外光探测器的主要挑战是将光线融入一个小纳米级活动区域，并有效地将其转换为电信号。在这里，我们通过有效地将等离子体天线耦合到六边形-BN中的双曲线声子 - 两极，再到高度浓缩的中红外光，从而克服了所有这些挑战。我们平衡了通过设备几何形状吸收，电导率的吸收，电导率和导热率的相互作用。这种新颖的方法具有出色的设备性能，具有室温高灵敏度（NEP为82 pw pw-per-froot-Hz），以及17纳秒（设置限制）的快速上升时间，因此，在最先进的石墨烯和商业互惠率检测器中实现了目前尚不存在的组合。我们还开发了一个多物理模型，该模型与我们的实验结果显示出极好的定量一致性，并揭示了对我们的光响应的不同贡献，从而为这些类型的光电探测器甚至超出了中红外范围铺平了道路。
Integrating and manipulating the nano-optoelectronic properties of Van der Waals heterostructures can enable unprecedented platforms for photodetection and sensing. The main challenge of infrared photodetectors is to funnel the light into a small nanoscale active area and efficiently convert it into an electrical signal. Here, we overcome all of those challenges in one device, by efficient coupling of a plasmonic antenna to hyperbolic phonon-polaritons in hexagonal-BN to highly concentrate mid-infrared light into a graphene pn-junction. We balance the interplay of the absorption, electrical and thermal conductivity of graphene via the device geometry. This novel approach yields remarkable device performance featuring room temperature high sensitivity (NEP of 82 pW-per-square-root-Hz) and fast rise time of 17 nanoseconds (setup-limited), among others, hence achieving a combination currently not present in the state-of-the-art graphene and commercial mid-infrared detectors. We also develop a multiphysics model that shows excellent quantitative agreement with our experimental results and reveals the different contributions to our photoresponse, thus paving the way for further improvement of these types of photodetectors even beyond mid-infrared range.
