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

  • 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-Pérot 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.
Author:Pablo Pons-Valencia, Francisco J. Alfaro-Mozaz, Matthias WiechaORCiDGND, Vladimír Biolek, Irene Dolado, Saul Vélez, Peining Li, Pablo Alonso González, Felix Casanova, Luis E. Hueso, Luis Martin-Moreno, Rainer Hillenbrand, Alexey Nikitin
Pubmed Id:
Parent Title (English):Nature Communications
Publisher:Nature Publishing Group UK
Place of publication:[London]
Document Type:Article
Year of Completion:2019
Date of first Publication:2019/07/19
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2019/10/23
Tag:Nanophotonics and plasmonics; Sub-wavelength optics; Two-dimensional materials
Issue:1, Art. 3242
Page Number:8
First Page:1
Last Page:8
Open Access: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
Institutes:Physik / Physik
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - Namensnennung 4.0