Launching of hyperbolic phonon-polaritons in h-BN slabs by resonant metal plasmonic antennas

Pons-Valencia, P. ; Alfaro-Mozaz, F.J. ; Wiecha, M.M. ; Biolek, V. ; Dolado, I. ; Velez, S. ; Li, P. ; Alonso-Gonzalez, P. ; Casanova, F. ; Hueso, L.E. ; Martin-Moreno, L. (Universidad de Zaragoza) ; Hillenbrand, R. ; Nikitin, A.Y.

Resumen: Launching and manipulation of polaritons in van der Waals materials offers novel opportunities for field-enhanced molecular spectroscopy and photodetection, among other applications. Particularly, the highly confined hyperbolic phonon polaritons (HPhPs) in h-BN slabs attract growing interest for their capability of guiding light at the nanoscale. An efficient coupling between free space photons and HPhPs is, however, hampered by their large momentum mismatch. Here, we show -by far-field infrared spectroscopy, infrared nanoimaging and numerical simulations- that resonant metallic antennas can efficiently launch HPhPs in thin h-BN slabs. Despite the strong hybridization of HPhPs in the h-BN slab and Fabry-Perot plasmonic resonances in the metal antenna, the efficiency of launching propagating HPhPs in h-BN by resonant antennas exceeds significantly that of the non-resonant ones. Our results provide fundamental insights into the launching of HPhPs in thin polar slabs by resonant plasmonic antennas, which will be crucial for phonon-polariton based nanophotonic devices.

Idioma: Inglés

DOI: 10.1038/s41467-019-11143-7

Año: 2019

Publicado en: Nature Communications 10 (2019), 3242 [8 pp.]
ISSN: 2041-1723

Factor impacto JCR: 12.121 (2019)

Categ. JCR: MULTIDISCIPLINARY SCIENCES rank: 6 / 71 = 0.085 (2019) - Q1 - T1

Factor impacto SCIMAGO: 5.569 - Biochemistry, Genetics and Molecular Biology (miscellaneous) (Q1) - Physics and Astronomy (miscellaneous) (Q1) - Chemistry (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/CSIC/PIC2016-60E046
Financiación: info:eu-repo/grantAgreement/EC/H2020/705960/EU/Switching graphene-plasmon with phase-change materials
Financiación: info:eu-repo/grantAgreement/EC/H2020/715496/EU/Nano-optics on flatland: from quantum nanotechnology to nano-bio-photonics/2DNANOPTICA
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2015-65159-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2015-65525-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2017-88358-C3
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MDM-2016-0618
Financiación: info:eu-repo/grantAgreement/ES/MINECO/RTI2018-094830-B-100

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)