Publication detail
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. HILLENBRAND, R. NIKITIN, A.Y.
English title
Launching of hyperbolic phonon-polaritons in h-BN slabs by resonant metal plasmonic antennas
Type
journal article in Web of Science
Language
en
Original abstract
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.
English abstract
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.
Keywords in English
metamaterials; modes; nitride; films
Released
19.07.2019
Publisher
Springer Nature
ISSN
2041-1723
Volume
10
Number
1
Pages from–to
1–8
Pages count
8
BIBTEX
@article{BUT160664,
author="Pablo {Pons-Valencia} and Francisco Javier {Alfaro-Mozaz} and Matthias Marco {Wiecha} and Vladimír {Biolek} and Ignacio {Dolado} and Saul {Velez} and Peining {Li} and Pablo {Alonso-González} and Felix {Casanova} and Luis E. {Hueso} and Luis {Martin-Moreno} and Rainer {Hillenbrand} and Alexey {Nikitin},
title="Launching of hyperbolic phonon-polaritons in h-BN slabs by resonant metal plasmonic antennas",
year="2019",
volume="10",
number="1",
month="July",
pages="1--8",
publisher="Springer Nature",
issn="2041-1723"
}