Asymmetric Two-Terminal Graphene Detector for Broadband Radiofrequency Heterodyne- and Self-Mixing

Nano Letters
Jiayue TongJun Yan

Abstract

Graphene, a single atomic layer of covalently bonded carbon atoms, has been investigated intensively for optoelectronics and represents a promising candidate for high-speed electronics. Here, we present a microwave mixer constructed as an asymmetrically contacted two-terminal graphene device based on the thermoelectric effect. We report a 50 GHz (minimum) mixer bandwidth as well as 130 V/W (163 mA/W) extrinsic direct-detection responsivity. Anomalous second-harmonic generation due to self-mixing in our graphene detector is also observed. Careful investigation of the responsivity from four different approaches gives consistent results, confirming the exceptional performance of our zero-bias device operating at room temperature. The 50 GHz bandwidth indicates an extremely fast response time and our experimental results represent an encouraging advance toward practical graphene microwave devices with anticipated future applications extended through millimeter wave and terahertz frequencies.

References

Mar 3, 2007·Nature Materials·A K Geim, K S Novoselov
May 16, 2007·Physical Review Letters·Jun YanAron Pinczuk
Apr 2, 2008·The Review of Scientific Instruments·Sergey CherednichenkoErik Kollberg
Jun 22, 2010·Nature Nanotechnology·Sukang BaeSumio Iijima
May 10, 2011·Nature·Ming LiuXiang Zhang
Jun 2, 2011·Nano Letters·Alexander UrichThomas Mueller
Jun 11, 2011·Science·Yu-Ming LinKeith A Jenkins
Jun 5, 2012·Nature Nanotechnology·Jun YanH D Drew
Jan 31, 2014·Nature Communications·Shu-Jen HanWilfried Haensch
Jun 14, 2013·Physical Review Letters·M-H KimH D Drew
Sep 10, 2014·Nature Nanotechnology·Xinghan CaiMichael S Fuhrer
Sep 10, 2014·Nano Letters·Audrey ZakJan Stake
Jun 26, 2015·Nature Communications·Shuang PiQiangfei Xia
Jul 29, 2015·Nano Letters·Jiayue TongJun Yan
Feb 14, 2018·Physical Review Letters·Shao-Yu ChenJun Yan

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