Plasmonic antenna coupling to hyperbolic phonon-polaritons for sensitive and fast mid-infrared photodetection with graphene.
Plasmonic antenna coupling to hyperbolic phonon-polaritons for sensitive and fast mid-infrared photodetection with graphene.
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DOI：
10.1038/s41467-020-18544-z
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发表时间：
2020-09-25
影响因子：
16.6
通讯作者：
Koppens FHL
中科院分区：
文献类型：
--
作者：
Castilla S;Vangelidis I;Pusapati VV;Goldstein J;Autore M;Slipchenko T;Rajendran K;Kim S;Watanabe K;Taniguchi T;Martín-Moreno L;Englund D;Tielrooij KJ;Hillenbrand R;Lidorikis E;Koppens FHL
集成和操纵货车德瓦尔斯异质结构的纳米光电特性可以实现前所未有的光电检测和传感平台。红外光电探测器的主要挑战是将光汇集到一个小的纳米级有源区域，并有效地将其转换为电信号。在这里，我们在一个设备中克服了所有这些挑战，通过等离子体天线与六边形BN中的双曲声子极化激元的有效耦合，将中红外光高度集中到石墨烯pn结中。我们通过器件的几何形状来平衡石墨烯的吸收、导电性和导热性的相互作用。这种方法产生了卓越的器件性能，具有室温高灵敏度（82 pW的NEP）和17纳秒的快速上升时间（设置限制）等，因此实现了目前最先进的石墨烯和商业中红外探测器中不存在的组合。我们还开发了一个多物理场模型，该模型与我们的实验结果具有很好的定量一致性，并揭示了对我们光响应的不同贡献，从而为进一步改进这些类型的光电探测器铺平了道路，甚至超出了中红外范围。红外（IR）光电探测器的一个重大挑战是将光汇集到一个小的纳米级有源区域，并有效地将其转换为电信号。在这里，作者将等离子体天线耦合到六边形BN中的双曲声子极化激元，以将中红外光高度集中到石墨烯pn结中。
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 approach yields remarkable device performance featuring room temperature high sensitivity (NEP of 82 pW) 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 very good 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. A significant challenge of infrared (IR) photodetectors is to funnel light into a small nanoscale active area and efficiently convert it into an electrical signal. Here, the authors couple a plasmonic antenna to hyperbolic phonon-polaritons in hexagonal-BN to highly concentrate mid-IR light into a graphene pn-junction.
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影响因子：
19.4
作者：
Cakmakyapan, Semih;Lu, Ping Keng;Jarrahi, Mona
通讯作者：
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影响因子：
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作者：
Castilla, Sebastian;Terres, Bernat;Koppen, Frank H. L.
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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