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The authors report the observation of a cavity mode, at λ = 0.94 µm, which is tightly confined between two slabs of two-dimensional photonic crystals deeply etched into a laser-like heterostructure waveguide. Guided photoluminescence of this heterostructure is used as an internal point source to probe the horizontal cavity.
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Labilloy et al. (1997) studied this question.
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