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Photonic structures and their preparation
Varga, Marián ; Ondič, Lukáš ; Hruška, Karel ; Potměšil, Jiří ; Libertínová, Jitka ; Kromka, Alexander ; Remeš, Zdeněk
Photonic crystals are periodically structured electromagnetic media, generally possessing photonic band gaps: ranges of frequency in which light cannot propagate through the structure. This periodicity, which length scale is proportional to the wavelength of light in the band gap, is the electromagnetic analogue of a crystalline atomic lattice, where the latter acts on the electron wavefunction to produce the familiar band gaps of semiconductors, and so on, in solid-state physics. Several examples of organisms and structures possessing photonic crystals and iridescence are visible all around us (Morpho didius, Pavo cristatus, Chrysochroa vittata, Chrysina resplendens, …).
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Microstructure optical fibres
Kaňka, Jiří ; Honzátko, Pavel ; Matějec, Vlastimil ; Kašík, Ivan ; Martan, Tomáš
A review of microstructure optical fibers, their use and methods of preparation is presented. Two classes of microstructure optical fibers in accordance with wave guiding mechanism are introduced. Unique dispersion properties and their structure dependence are discussed. Highly nonliner fibers, large mode area fibers and highly birefringent fibers are reported. Finally, the research carried out IREE Prague is summarized.
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