Strong coupling between phonon-polaritons and plasmonic nanorods

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 an...

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Detalhes bibliográficos
Autores: Huck-Iriart, Cristián, Vogt, Jochen, Neuman, Tomáš, Nagao, Tadaaki, Hillenbrand, Rainer, Aizpurua, Javier, Pucci, Annemarie, Neubrech, Frank
Tipo de documento: artigo
Estado:Versão publicada
Data de publicação:2016
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositório:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/246457
Acesso em linha:http://hdl.handle.net/10261/246457
Access Level:Acceso aberto
Descrição
Resumo: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.