Open AccessStrong coupling between phonon-polaritons and plasmonic nanorods
Author(s) -
Christian Huck,
Jochen Vogt,
Tomáš Neuman,
Tadaaki Nagao,
Rainer Hillenbrand,
Javier Aizpurua,
Annemarie Pucci,
Frank Neubrech
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.025528
Subject(s) - plasmon , polariton , materials science , cloaking , optoelectronics , surface plasmon polariton , optics , phonon , scattering , nanorod , surface plasmon , metamaterial , condensed matter physics , physics , nanotechnology
We perform far-field spectroscopy of infrared metal antennas on silicon oxide layers of different thickness, where we find a splitting of the plasmonic resonance. This splitting can result in a transparency window, corresponding to suppression of antenna scattering, respectively "cloaking" of the antenna. Backed up by theory, we show that this effect is caused by strong coupling between the metal antenna plasmons and the surface phonon polaritons in the oxide layer. The effect is a kind of induced transparency in which the strength of the phonon-polariton field plays the crucial role. It represents a further tuning possibility for the optical performance of infrared devices.