Optical Characterization of Photonic Microstructures

Microstructured photonic materials are expected to show full photonic bandgap (PBG) effects if the periodic arrangement of the photonic lattice is appropriately chosen and there is sufficent refractive index contrast. A PBG crystal can be seen as a three-dimensional Bragg reflector for photons. Such materials may eventually lead to a new generation light emitting devices with ultralow threshold, high efficiency, and very low noise. The fabrication of suitable three-dimensional photonic crystals at optical wavelengths is difficult and may not be practical for some time, which is why our work is focused on lower-dimensional patterns embedded in a waveguide structure.

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