The original square‐lattice band‐edge structure emitted light in different directions. In a recent paper [18], we have improved the directivity of these structures by using a honeycomb photonic crystal to shield the original structure. This has improved the performance of such devices, in such a way that light can be coupled directionally to a large waveguide. In this paper, we present a steady‐state analysis of the performance of this directive device and study the amount of power which can be coupled into the waveguide, analyzing its performance as an in‐plane emitter and the limitations caused by vertical losses.
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Cazo et al. (2005) studied this question.
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