Ultrafast Tunable Terahertz-to-Visible Light Conversion through Thermal Radiation from Graphene Metamaterials
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...
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| Veröffentlicht in: | Nano letters 2023-05, Vol.23 (9), p.3872-3878 |
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| creator | 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 |
| description | 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. |
| doi_str_mv | 10.1021/acs.nanolett.3c00507 |
| format | Article |
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| subjects | Letter |
| title | Ultrafast Tunable Terahertz-to-Visible Light Conversion through Thermal Radiation from Graphene Metamaterials |
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