Chapter 9 Planar Hybrid Plasmonic-Photonic Crystals

摘要

The invention of hybrid crystals brought about the simultaneous usage of different mechanisms of light transfer into effect in one and the same architecture. We have discussed the preparation, structure and optical properties of planar hybrid metal-dielectric crystals, light in which is carried by photons and plasmons. Studied hybrids are based on the monolayers of spheres - the planar hexagonal packages of colloidal beads on a substrate. Two basic modifications, the monolayer on a flat metal film and the corrugated metal film on the monolayer have been prepared. Owing to their topology, hybrid crystals respond to the incident light depending on the wavelength, the polarization and the propagation direction with different optical resonances. The respective resonances are the light diffraction in the planar lattice, the diffraction of surface plasmon polaritons in the periodically profiled film, the localized particle and cavity plasmons in metal semishells and Fabry-Perot oscillations. Besides, interpenetration of plasmonic and photonic crystals results in the efficient hybridization of photonic and plasmonic modes. Overlay of different resonances leads to their further modification described by Fano process. The apparent complexity of the optical properties is paired by their broad variability either by means of tuning the topology and composition of hybrids or through external stimuli. The simple and inexpensive technology in combination with very rich physics ensures the attractiveness of hybrid crystals for fundamental research and practical applications.