Giant enhancement of third-harmonic generation in graphene–metal heterostructures
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2205.12720.pdf
Description
Accepted version
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6.62 MB
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Checksum (MD5)
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Author(s)
Alonso Calafell, Irati
Rozema, Lee A
Alcaraz Iranzo, David
Trenti, Alessandro
Jenke, Philipp K
Cox, Joel D
Kumar, Avinash
Bieliaiev, Hlib
Nanot, Sébastien
Peng, Cheng
Date Issued
2021
Journal
Nature Nanotechnology
Publisher
Springer Science and Business Media LLC
Citation
Alonso Calafell, Irati, Rozema, Lee A, Alcaraz Iranzo, David, Trenti, Alessandro, Jenke, Philipp K et al. 2021. "Giant enhancement of third-harmonic generation in graphene–metal heterostructures." Nature Nanotechnology, 16 (3).
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Author's final manuscript
Abstract
© 2020, The Author(s), under exclusive licence to Springer Nature Limited. Nonlinear nanophotonics leverages engineered nanostructures to funnel light into small volumes and intensify nonlinear optical processes with spectral and spatial control. Owing to its intrinsically large and electrically tunable nonlinear optical response, graphene is an especially promising nanomaterial for nonlinear optoelectronic applications. Here we report on exceptionally strong optical nonlinearities in graphene–insulator–metal heterostructures, which demonstrate an enhancement by three orders of magnitude in the third-harmonic signal compared with that of bare graphene. Furthermore, by increasing the graphene Fermi energy through an external gate voltage, we find that graphene plasmons mediate the optical nonlinearity and modify the third-harmonic signal. Our findings show that graphene–insulator–metal is a promising heterostructure for optically controlled and electrically tunable nano-optoelectronic components.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1038/S41565-020-00808-W
