TY  - JOUR
A1  - Pons-Valencia, Pablo
A1  - Alfaro-Mozaz, Francisco J.
A1  - Wiecha, Matthias
A1  - Biolek, Vladimír
A1  - Dolado, Irene
A1  - Vélez, Saul
A1  - Li, Peining
A1  - Alonso González, Pablo
A1  - Casanova, Felix
A1  - Hueso, Luis E.
A1  - Martin-Moreno, Luis
A1  - Hillenbrand, Rainer
A1  - Nikitin, Alexey
T1  - Launching of hyperbolic phonon-polaritons in h-BN slabs by resonant metal plasmonic antennas
T2  - Nature Communications
N2  - 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.
KW  - Nanophotonics and plasmonics
KW  - Sub-wavelength optics
KW  - Two-dimensional materials
Y1  - 2019
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/51391
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-513911
SN  - 2041-1723
N1  - 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 http://creativecommons.org/licenses/by/4.0/.
VL  - 10
IS  - 1, Art. 3242
SP  - 1
EP  - 8
PB  - Nature Publishing Group UK
CY  - [London]
ER  -