Highly confined optical modes in nanoscale metal-dielectric multilayers
By I. Avrutsky, I. Salakhutdinov, James J. Elser, Viktor A. Podolskiy. 2007
183 citations recorded by the source corpus.
We show that a stack of metal-dielectric nanolayers, in addition to the long- and short-range plasmon polaritons, guides also an entire family of modes strongly confined within the multilayer—the bulk plasmon polariton modes. We propose a classification scheme that reflects specific properties of these modes. We report experimental verification of the bulk modes by measuring modal indices in a structure made of three pairs of silica 29 nm/gold 25 nm layers. DOI: 10.1103/PhysRevB.75.241402 PACS numbers: 73.20.Mf, 42.25.Bs, 42.82.Et, 73.21.Ac Nanoscale confinement of light is of great interest for applications in sensing, imaging, all-optical signal processing, and computing. Subwavelength confinement attributed to gap plasmon polaritons GPPs has been demonstrated in a thin dielectric layer surrounded by metallic claddings. 1 Here we present another solution to subdiffraction confinement of light and show that a stack of metal-dielectric nanolayers guides a family of modes strongly confined within the multilayer—the bulk plasmon polariton BPP modes. The bulk modes have very short penetration depth into the claddings even if the claddings are made of dielectric materials. Their modal indices ratio of the light velocity in vacuum to the phase velocity of a guided mode are typically large in absolute value and may be both positive and negative. 2 We propose a classification scheme that reflects specific properties of BPPs. We verify BPPs experimentally by measuring their modal indices in a structure made of three pairs of silica-gold nanolayers. When considering light confinement in a waveguide, the
Subfields: Atomic and Molecular Physics, and Optics, Biomedical Engineering, Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/26ea67515bee88043649bd75f6b3efa5f0cfe199
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Citations in the corpus
- Extreme sensitivity biosensing platform based on hyperbolic metamaterials. (2016, background): “HMMs have many promising applications based on their high-k modes, a concept that has been theoretically and experimentally investigated by many research groups 29,34,35 .”
- Quantum nanophotonics using hyperbolic metamaterials (2012, background): “A total internal reflection set up can be used to measure the tunneling of evanescent waves and to characterize the dispersion of these unique states [55].”