Journal
NATURE NANOTECHNOLOGY
Volume 16, Issue 3, Pages 318-+Publisher
NATURE RESEARCH
DOI: 10.1038/s41565-020-00808-w
Keywords
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Funding
- European Commission through ErBeSta [800942]
- Austrian Research Promotion Agency (FFG) through the QuantERA ERA-NET Cofund project HiPhoP
- Austrian Science Fund (FWF) [W 1210-N25, P30067-N36, F 7113-N38]
- US Air Force Office of Scientific Research [FA2386-233 17-1-4011, FA8655-20-1-7030]
- Red Bull GmbH
- ERC [789104-eNANO]
- Spanish MINECO [SEV2015-0522, MAT2017-88492-R]
- Government of Spain [FIS2016-81044]
- Fundacio Cellex
- Fundacio Mir-Puig
- Generalitat de Catalunya (CERCA, AGAUR) [SGR 1656]
- Government of Spain (Severo Ochoa) [CEX2019-000910-S]
- European Union [785219, 881603]
- ERC TOPONANOP [726001]
- Catalan CERCA
- Fundacio Privada Cellex
- Spanish Ministry of Economy and Competitiveness through the 'Severo Ochoa' Programme for Centres of Excellence in RD [SEV-2015-0522]
- Fundacio Cellex Barcelona, Generalitat de Catalunya, through the CERCA programme
- NSF Center for Integrated Quantum Materials (CIQM)
- US Army Research Office [W911NF-17-1-0435]
- Institute for Soldier Nanotechnologies [W911NF-18-2-0048]
- University of Southern Denmark
- VILLUM Fonden [16498]
- University of Vienna via the Vienna Doctoral School
- Templeton World Charity Foundation [TWCF0194]
- Spanish MINECO FPI Grant [BES-2014-068504]
- European Union's Horizon 2020 research and innovation programme under the Marie Skodowska-Curie grant [801110]
- Austrian Federal Ministry of Education, Science and Research (BMBWF)
- European Commission via GRASP [613024]
- Austrian Science Fund (FWF) [P30067] Funding Source: Austrian Science Fund (FWF)
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Graphene-insulator-metal heterostructures exhibit significantly enhanced optical nonlinearity, offering potential for optically controlled and electrically tunable nano-optoelectronic devices.
Graphene-insulator-metal heterostructures show three orders of magnitude enhancement of the third-harmonic generation with respect to the bare graphene case. 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.
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