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Highly confined optical modes in nanoscale metal-dielectric multilayers

2007; American Physical Society; Volume: 75; Issue: 24 Linguagem: Inglês

10.1103/physrevb.75.241402

1550-235X

Ivan Avrutsky, Ildar Salakhutdinov, Justin Elser, Viktor A. Podolskiy,

Photonic Crystals and Applications

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 $(\ensuremath{\sim}29\phantom{\rule{0.3em}{0ex}}\mathrm{nm})∕\text{gold}$ $(\ensuremath{\sim}25\phantom{\rule{0.3em}{0ex}}\mathrm{nm})$ layers.