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Light-matter interaction in quantum dots with 2-D/3-D photonic crystal nanocavity

We discuss recent advances in exaction-photon interaction in single quantum dot with 2D photonic crystal nanocavity, showing successful realization of single artificial atom lasers. Moreover, an experimental demonstration of coupling of quantum dots with a point-defect nanocavity is also presented in a 3D photonic crystal with the highest Q factor.