We have shown above that it is possible to generate light and confine it efficiently with high-Q optical nanocavities. However, if a nanophotonics system is to be constructed, it is also necessary to guide light from one device to another. Therefore, we have conducted extensive tests on photonic crystal waveguides to explore the opportunities of using this geometry to efficiently guide light, especially around very sharp bends [Fig. 4(c)]. We have observed evidence of guiding in these structures and we have been able to experimentally obtain the dispersion diagram of guided modes [Fig. 4(b)]. We have also proposed novel methods to control dispersion properties of these guided modes.
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