Plasmonic bandgap in random media
1 Department of Nanostructures Physics and Technology, St. Petersburg State Polytechnical University, Polytechnicheskaya 29, St. Petersburg 195251, Russia
2 Department of Condensed Matter Physics, St. Petersburg Academic University, Khlopina 8/3, St. Petersburg 195220, Russia
3 Institute of Photonics, University of Eastern Finland, Yliopistokatu 7, P.O. Box 111, Joensuu, 80101, Finland
Nanoscale Research Letters 2013, 8:324 doi:10.1186/1556-276X-8-324Published: 16 July 2013
We present a dispersion theory of the surface plasmon polaritons (SPP) in random metal-dielectric nanocomposite (MDN) consisting of bulk metal embedded with dielectric inclusions. We demonstrate that embedding of dielectric nanoparticles in metal results in the formation of the plasmonic bandgap due to strong coupling of the SPP at the metal-vacuum interface and surface plasmons localized at the surface of nanoinclusions. Our results show that MDN can replace metals in various plasmonic devices, which properties can be tuned in a wide spectral range. Being compatible with waveguides and other photonic structures, MDN offers high flexibility in the plasmonic system design.