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arXiv 2010.03040cond-mat.mes-hall
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用于灵敏太赫兹探测的隧道场效应晶体管

Tunnel field-effect transistors for sensitive terahertz detection

Igor Gayduchenko, Shuigang Xu, Georgy Alymov, Maxim Moskotin, Ivan Tretyakov, Takashi Taniguchi, Kenji Watanabe, Gregory Goltsman, Andre K. Geim, Georgy Fedorov… 展开作者

Igor Gayduchenko, Shuigang Xu, Georgy Alymov, Maxim Moskotin, Ivan Tretyakov, Takashi Taniguchi, Kenji Watanabe, Gregory Goltsman, Andre K. Geim, Georgy Fedorov, Dmitry Svintsov, Denis A. Bandurin

摘要:

将电磁波整流为直流电是能量收集、超5G无线通信、超快科学和观测天文学的关键过程。随着辐射频率提高到亚太赫兹(THz)域,传统电子器件的交流到直流转换变得具有挑战性,需要替代整流协议。在这里,我们通过双层石墨烯(BLG)制成的隧道场效应晶体管来解决这一挑战。利用BLG的电调谐能带结构,我们创建一个横向隧道结,并将其耦合到暴露于太赫兹辐射的天线。然后通过隧道结非线性对入射辐射进行下变频,从而实现高响应度(> 4 kV/W)和低噪声(0.2 pW/ $\sqrt{\mathrm{Hz}}$ })检测。我们演示了如何切换带内欧姆带间隧穿制度可以提高探测器的响应度的几个数量级,与发达的理论。我们的工作展示了隧道晶体管在THz探测中的潜在应用,并揭示了BLG作为一个有前途的平台。

英文摘要:

The rectification of electromagnetic waves to direct currents is a crucial process for energy harvesting, beyond-5G wireless communications, ultra-fast science, and observational astronomy. As the radiation frequency is raised to the sub-terahertz (THz) domain, ac-to-dc conversion by conventional electronics becomes challenging and requires alternative rectification protocols. Here we address this challenge by tunnel field-effect transistors made of bilayer graphene (BLG). Taking advantage of BLG's electrically tunable band structure, we create a lateral tunnel junction and couple it to an antenna exposed to THz radiation. The incoming radiation is then down-converted by the tunnel junction nonlinearity, resulting in high-responsivity (> 4 kV/W) and low-noise (0.2 pW/$\sqrt{\mathrm{Hz}}$}) detection. We demonstrate how switching from intraband Ohmic to interband tunneling regime can raise detectors' responsivity by few orders of magnitude, in agreement with the developed theory. Our work demonstrates a potential application of tunnel transistors for THz detection and reveals BLG as a promising platform therefor.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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