title: Optimizing strontium ruthenate thin films for near-infrared plasmonic applications.
abstract: Several new plasmonic materials have recently been introduced in order to achieve better temperature stability than conventional plasmonic metals and control field localization with a choice of plasma frequencies in a wide spectral range. Here, epitaxial SrRuO3 thin films with low surface roughness fabricated by pulsed laser deposition are studied. The influence of the oxygen deposition pressure (20-300 mTorr) on the charge carrier dynamics and optical constants of the thin films in the near-infrared spectral range is elucidated. It is demonstrated that SrRuO3 thin films exhibit plasmonic behavior of the thin films in the near-infrared spectral range with the plasma frequency in 3.16-3.86 eV range and epsilon-near-zero wavelength in 1.11-1.47 μm range that could be controlled by the deposition conditions. The possible applications of these films range from the heat-generating nanostructures in the near-infrared spectral range, to metamaterial-based ideal absorbers and epsilon-near-zero components, where the interplay between real and imaginary parts of the permittivity in a given spectral range is needed for optimizing the spectral performance.
authors.affiliation: Department of Materials, Imperial College London, Prince Consort Road, London SW7 2AZ, UK.
authors.forename: Laurentiu
authors.initials: L
authors.lastname: Braic
authors.affiliation: Department of Physics, King's College London, Strand, London WC2R 2LS, UK.
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Vasilantonakis
authors.affiliation: Department of Materials, Imperial College London, Prince Consort Road, London SW7 2AZ, UK.
authors.forename: Bin
authors.initials: B
authors.lastname: Zou
authors.affiliation: Department of Physics, Imperial College London, Prince Consort Road, London SW7 2BB, UK.
authors.forename: Stefan A
authors.initials: SA
authors.lastname: Maier
authors.affiliation: Department of Materials, Imperial College London, Prince Consort Road, London SW7 2AZ, UK.
authors.forename: Neil McN
authors.initials: NM
authors.lastname: Alford
authors.affiliation: Department of Physics, King's College London, Strand, London WC2R 2LS, UK.
authors.forename: Anatoly V
authors.initials: AV
authors.lastname: Zayats
authors.affiliation: Department of Materials, Imperial College London, Prince Consort Road, London SW7 2AZ, UK.
authors.forename: Peter K
authors.initials: PK
authors.lastname: Petrov