Sub-diffractional cavity modes of terahertz hyperbolic phonon polaritons in tin oxide
Autor: | Faccin, Giovani Manzeppi, 1982, Mayer, Rafael Alves, 1994 |
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Přispěvatelé: | UNIVERSIDADE ESTADUAL DE CAMPINAS |
Rok vydání: | 2021 |
Předmět: | |
Zdroj: | Repositório da Produção Científica e Intelectual da Unicamp Universidade Estadual de Campinas (UNICAMP) instacron:UNICAMP Repositório Institucional da Unicamp |
Popis: | Agradecimentos: We thank the Brazilian Synchrotron Light Laboratory (LNLS), Advanced Light Source (ALS), and Helmholtz-Zentrum Dresden-Rossendorf (HZDR) for providing beamtime for the experiments. Parts of this research were carried out at ELBE at the Helmholtz-Zentrum Dresden-Rossendorf e. V., a member of the Helmholtz Association. I.D.B., E.R.V., and J.C.G. thank Geraldo M. Ribeiro (UFMG) for preliminary studies of production and characterization of tin oxide nanobelts and A. Gobbi (LNNano), and M.H.O. Piazetta (LNNano) for the support on samples preparation. R.O.F. and I.D.B. thank T.M. Santos (LNLS) and A. Cernescu (Neaspec) for technical assistance. I.D.B. and A.M. acknowledge the financial support from the Brazilian Nanocarbon Institute of Science and Technology (INCT/Nanocarbono). F.C.B.M. and F.H.F. acknowledge the CNPq project 140594/2020-5. R.O.F. and R.A.M. acknowledge the FAPESP project 2019/08818-9. R.O.F. acknowledges the support from CNPq through the research grant 311564/2018-6 and FAPESP Young Investigator grant 2019/14017-9. I.D.B. acknowledges the support from CNPq through the research grant 311327/2020-6. J.C.G. acknowledges the financial support of Brazilian agencies CNPq and FAPEMIG. L.W., L.M.E., and S.C.K. acknowledge funding by the BMBF under grants 05K16ODA and 05K19ODB, as well as by the Würzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter (ct.qmat) and by the TU Dresden graduate academy. E.R.V. would like to acknowledge the CNPq projects 403360/2016-1 and 311534/2017-1, the Center of Microscopy at the Universidade Federal de Minas Gerais (UFMG) and Universidade Tecnológica Federal do Paraná (CMCM-UTFPR-CT) for providing the equipment and technical support for the electron microscopy experiments. This research used resources of the Advanced Light Source, a U.S. DOE Office of Science User Facility under contract no. DE-AC02-05CH11231 Abstract: Hyperbolic phonon polaritons have recently attracted considerable attention in nanophotonics mostly due to their intrinsic strong electromagnetic field confinement, ultraslow polariton group velocities, and long lifetimes. Here we introduce tin oxide (SnO2) nanobelts as a photonic platform for the transport of surface and volume phonon polaritons in the mid- to far-infrared frequency range. This report brings a comprehensive description of the polaritonic properties of SnO2 as a nanometer-sized dielectric and also as an engineered material in the form of a waveguide. By combining accelerator-based IR-THz sources (synchrotron and free-electron laser) with s-SNOM, we employed nanoscale far-infrared hyper-spectral-imaging to uncover a Fabry-Perot cavity mechanism in SnO2 nanobelts via direct detection of phonon-polariton standing waves. Our experimental findings are accurately supported by notable convergence between theory and numerical simulations. Thus, the SnO2 is confirmed as a natural hyperbolic material with unique photonic properties essential for future applications involving subdiffractional light traffic and detection in the far-infrared range. Systems that help to enable nanophotonics in the terahertz region are in demand for developing technologies. The authors introduce and study the photonic properties of tin oxide nanobelts as such a platform, supporting phonon polaritons in the far-IR range CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQ FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE MINAS GERAIS - FAPEMIG Aberto |
Databáze: | OpenAIRE |
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