Giant enhancement of third-harmonic generation in graphene-metal heterostructures

Funding

We thank S. Zanotto for assistance with the Matlab code. P.W. acknowledges support from the European Commission through ErBeSta (no. 800942), the Austrian Research Promotion Agency (FFG) through the QuantERA ERA-NET Cofund project HiPhoP, the Austrian Science Fund (FWF) through CoQuS (W 1210-N25), NaMuG (P30067-N36) and BeyondC (F 7113-N38), the US Air Force Office of Scientific Research (FA2386-233 17-1-4011 and FA8655-20-1-7030) and Red Bull GmbH. F.J.G.A. acknowledges support from the ERC (Advanced Grant 789104-eNANO) and the Spanish MINECO (MAT2017-88492-R). F.H.L.K. acknowledges support from the Government of Spain (FIS2016-81044, Severo Ochoa CEX2019-000910-S), Fundacio Cellex, Fundacio Mir-Puig and Generalitat de Catalunya (CERCA, AGAUR, SGR 1656). Furthermore, the research leading to these results received funding from the European Union's Horizon 2020 under grant agreements no. 785219 (Graphene flagship Core2) and no. 881603 (Graphene flagship Core3). This work was supported by the ERC TOPONANOP under grant agreement no. 726001. ICFO is financially supported by the Spanish MINECO (SEV2015-0522), the Catalan CERCA, Fundacio Privada Cellex, the Spanish Ministry of Economy and Competitiveness through the 'Severo Ochoa' Programme for Centres of Excellence in R&D (SEV-2015-0522) and Fundacio Cellex Barcelona, Generalitat de Catalunya, through the CERCA programme. The MIT portion of this work was supported in part by the NSF Center for Integrated Quantum Materials (CIQM), the US Army Research Office (Award W911NF-17-1-0435) and the Institute for Soldier Nanotechnologies (contract no. W911NF-18-2-0048). The Center for Nano Optics is financially supported by the University of Southern Denmark (SDU 2020 funding). J.D.C. was supported by VILLUM Fonden (grant no. 16498). I.A.C. and P.K.J. acknowledge support from the University of Vienna via the Vienna Doctoral School. L.A.R. acknowledges support from the Templeton World Charity Foundation (fellowship no. TWCF0194). D.A.I. acknowledges support from the Spanish MINECO FPI Grant (BES-2014-068504). A.T. acknowledges support from the European Union's Horizon 2020 research and innovation programme under the Marie Skodowska-Curie grant agreement no. 801110 and the Austrian Federal Ministry of Education, Science and Research (BMBWF). All authors acknowledge support from the European Commission via GRASP (No. 613024). This article reflects only the authors' views-the EU Agency is not responsible for any use that may be made of the information it contains.