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The analysis of an angular distribution of the emission intensity of atwo-level atom (dipole) in a photonic crystal reveals an enhancement of theemission rate in some observation directions. Such an enhancement is the resultof the bunching of many Bloch eigenwaves with different wave vectors in thesame direction due to the crystal anisotropy. If a spatial distribution of theemission intensity is considered, the interference of these eigenwaves shouldbe taken into account. In this paper, the far-field emission pattern of atwo-level atom is discussed in the framework of the asymptotic analysis theclassical macroscopic Green function. Numerical example is given for atwo-dimensional square lattice of air holes in polymer. The relevance ofresults for experimental observation is discussed.

Spatial distribution of the emission intensity in a photonic crystal: Self-interference of Bloch eigenwaves