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21 April 2016 Unconventional optical Tamm defect states in metal-terminated opal photonic crystals
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Optical Tamm surface states are formed in 3-dimensional photonic crystals coated by thin metal films. These states appear in registry with diffraction resonances and localize the electromagnetic energy in resonators formed by diffraction mirrors of lattice planes and metal semishells. Tamm defect states provide the bypass for light in the spectral range of photonic stop-bands and thus reduce the efficiency of the Bragg diffraction resonances. In spite of hidden nature of this effect, its magnitude is comparable to the extraordinary transmission associated with tunneling of surface plasmon polaritons, which are simultaneously excited at surfaces of corrugated metal film coating.
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Alexander V. Korovin and Sergei G. Romanov "Unconventional optical Tamm defect states in metal-terminated opal photonic crystals", Proc. SPIE 9885, Photonic Crystal Materials and Devices XII, 98851M (21 April 2016);

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