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1 March 2006 Role of one-dimensional singularities in the operation of some photonic-crystal-based devices
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Waveguides in photonic crystals are one-dimensional photonic systems, with a richer basic physics than micro/nanocavities thanks to their extended nature. We evidence various roles of the one-dimensional singularities that occur at zero-group velocity points dispersion relations and mode anticrossings: One role is the demultiplexing in a space-localized fashion, combining properties of the Fabry-Perot and grating dispersive devices in a miniature footprint. Various aspects of the realization of such devices will be presented, towards WDM or coarse WDM applications in the framework of the european FUNFOX project. Another role is the possiblity to enhance gain in inverse proportion of the slwoed-down group velocity. A third possiblity is to produce a Purcell effect and thus a shorter lifetime for emitters embedded in such waveguides. This last possibility raises the prospect of an integrated high efficiency source with controlled photon modes.
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H. Benisty, L. Martinelli, E. Viasnoff-Schwoob, M. A. Pinault, C. Weisbuch, G.-H. Duan, H. Heidrich, K. Janiak, and I. Robert-Philip "Role of one-dimensional singularities in the operation of some photonic-crystal-based devices", Proc. SPIE 6128, Photonic Crystal Materials and Devices IV, 61280P (1 March 2006);

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