TY - JOUR
T1 - Ultrafast Tunable Terahertz-to-Visible Light Conversion through Thermal Radiation from Graphene Metamaterials
AU - Ilyakov, Igor
AU - Ponomaryov, Alexey
AU - Saleta Reig, David
AU - Murphy, Conor
AU - Mehew, Jake Dudley
AU - de Oliveira, Thales V.A.G.
AU - Prajapati, Gulloo Lal
AU - Arshad, Atiqa
AU - Deinert, Jan-Christoph
AU - Craciun, Monica Felicia
AU - Russo, Saverio
AU - Kovalev, Sergey
AU - Tielrooij, Klaas Jan
N1 - Funding Information:
Parts of this research were carried out at ELBE at the Helmholtz-Zentrum Dresden-Rossendorf e.V., a member of the Helmholtz Association. S.R. and M.F.C. acknowledge financial support by the EPSRC (EP/V048163/1, EP/V052306/1) and the Leverhulme Trust.
PY - 2023/5/10
Y1 - 2023/5/10
N2 - 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.
AB - 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.
KW - electrical gating
KW - frequency conversion
KW - graphene
KW - metamaterial
KW - terahertz radiation
KW - ultrafast thermal emission
UR - http://www.scopus.com/inward/record.url?scp=85156200365&partnerID=8YFLogxK
U2 - 10.1021/acs.nanolett.3c00507
DO - 10.1021/acs.nanolett.3c00507
M3 - Article
C2 - 37116109
AN - SCOPUS:85156200365
SN - 1530-6984
VL - 23
SP - 3872
EP - 3878
JO - Nano Letters
JF - Nano Letters
IS - 9
ER -