Milliwatt terahertz harmonic generation from topological insulator metamaterials
Tielrooij, Klaas-Jan (Institut Català de Nanociència i Nanotecnologia)
Principi, Alessandro (University of Manchester. School of Physics and Astronomy)
Saleta Reig, David (Institut Català de Nanociència i Nanotecnologia)
Block, Alexander (Institut Català de Nanociència i Nanotecnologia)
Varghese, Sebin (Institut Català de Nanociència i Nanotecnologia)
Schreyeck, Steffen (Universität Würzburg. Physikalisches Institut)
Brunner, Karl (Universität Würzburg. Physikalisches Institut)
Karczewski, Grzegorz (Universität Würzburg. Physikalisches Institut)
Ilyakov, Igor (Helmholtz-Zentrum Dresden-Rossendorf)
Ponomaryov, Oleksiy (Helmholtz-Zentrum Dresden-Rossendorf)
de Oliveira, Thales V. A. G. (Helmholtz-Zentrum Dresden-Rossendorf)
Chen, Min (Helmholtz-Zentrum Dresden-Rossendorf)
Deinert, Jan-Christoph (Helmholtz-Zentrum Dresden-Rossendorf)
Gómez Carbonell, Carmen (Institut Català de Nanociència i Nanotecnologia)
Valenzuela, Sergio O. (Institut Català de Nanociència i Nanotecnologia)
Molenkamp, Laurens W. (Universität Würzburg. Physikalisches Institut)
Kiessling, Tobias (Universität Würzburg. Physikalisches Institut)
Astakhov, Georgy V. (Helmholtz-Zentrum Dresden-Rossendorf)
Kovalev, Sergey (Helmholtz-Zentrum Dresden-Rossendorf)

Date:	2022
Abstract:	Achieving efficient, high-power harmonic generation in the terahertz spectral domain has technological applications, for example, in sixth generation (6G) communication networks. Massless Dirac fermions possess extremely large terahertz nonlinear susceptibilities and harmonic conversion efficiencies. However, the observed maximum generated harmonic power is limited, because of saturation effects at increasing incident powers, as shown recently for graphene. Here, we demonstrate room-temperature terahertz harmonic generation in a BiSe topological insulator and topological-insulator-grating metamaterial structures with surface-selective terahertz field enhancement. We obtain a third-harmonic power approaching the milliwatt range for an incident power of 75 mW-an improvement by two orders of magnitude compared to a benchmarked graphene sample. We establish a framework in which this exceptional performance is the result of thermodynamic harmonic generation by the massless topological surface states, benefiting from ultrafast dissipation of electronic heat via surface-bulk Coulomb interactions. These results are an important step towards on-chip terahertz (opto)electronic applications. Topological insulator metamaterials bring nonlinear terahertz photonic technology a step closer by producing a third-harmonic output power close to a milliwatt.
Grants:	European Commission 873028 European Commission 824140 European Commission 804349 Agencia Estatal de Investigación PID2019-111673GB-I00 Ministerio de Economía y Competitividad RYC-2017-22330 Ministerio de Economía y Competitividad SEV-2017-0706
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Nonlinear optics ; Metamaterials ; High-harmonic generation ; Terahertz optics
Published in:	Light, Science & Applications, Vol. 11 (2022) , ISSN 2047-7538

DOI: 10.1038/s41377-022-01008-y
PMID: 36316317

8 p, 803.6 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles