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Design of a prison for light in a diÂamond-like photonic crystal. The top-side of the crystal has been lifted to reveal the inner structure. The crystal has a diamond-like structure, made of two sets of mutually perÂpendicular pores that are drilled in silicon (blue-colored backbone material). To realize a resonant cavity, one pore in each set (indiÂcated by black arrows) has a smaller diamÂeter. At the intersection of these two pores, a point defect appears in the crystal. Extensive computations reveal that light is confined in a tiny volume about this point, as indicated by the yellow-colored region.
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