Ultrafast Tunable Terahertz-to-Visible Light Conversion through Thermal Radiation from Graphene Metamaterials.
Ultrafast Tunable Terahertz-to-Visible Light Conversion through Thermal Radiation from Graphene Metamaterials.
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DOI：
10.1021/acs.nanolett.3c00507
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发表时间：
2023-05-10
期刊：
影响因子：
10.8
通讯作者：
Tielrooij, Klaas-Jan
中科院分区：
文献类型：
--
作者：
Ilyakov, Igor;Ponomaryov, Alexey;Reig, David Saleta;Murphy, Conor;Mehew, Jake Dudley;de Oliveira, Thales V. A. G.;Prajapati, Gulloo Lal;Arshad, Atiqa;Deinert, Jan-Christoph;Craciun, Monica Felicia;Russo, Saverio;Kovalev, Sergey;Tielrooij, Klaas-Jan
关键词：
包括光电探测、成像和数据通信在内的几项技术可以从太赫兹（THz）光到可见光的快速可控转换中受益匪浅。在这里，我们证明了石墨烯中电子热的特殊性质和动力学允许太赫兹到可见光的转换，这是在亚纳秒时间尺度上可切换的。我们显示了一个可调的开/关比超过30的发射可见光，通过电门控使用1 V的顺序上的栅极电压实现。我们还表明，光栅石墨烯超材料导致太赫兹引起的发射功率在可见光范围内增加了2个数量级。实验结果与热力学模型一致，该模型描述了通过太赫兹光的带内Drude吸收加热的电子系统的黑体辐射。这些结果提供了一个很有前途的路线走向新的功能的光电子技术在太赫兹制度。
Several technologies, including photodetection, imaging, and data communication, could greatly benefit from the availability of fast and controllable conversion of terahertz (THz) light to visible light. Here, we demonstrate that the exceptional properties and dynamics of electronic heat in graphene allow for a THz-to-visible conversion, which is switchable at a sub-nanosecond time scale. We show a tunable on/off ratio of more than 30 for the emitted visible light, achieved through electrical gating using a gate voltage on the order of 1 V. We also demonstrate that a grating-graphene metamaterial leads to an increase in THz-induced emitted power in the visible range by 2 orders of magnitude. The experimental results are in agreement with a thermodynamic model that describes blackbody radiation from the electron system heated through intraband Drude absorption of THz light. These results provide a promising route toward novel functionalities of optoelectronic technologies in the THz regime.
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