Photon blockade induced tunable source of one/two photon in a double quantum dot-semiconductor microcavity system

We propose a scheme to implement a strong photon blockade with two interacting quantum dots, optically coupled to a semiconductor microcavity. The photon blockade effect is enhanced by simultaneously driving the microcavity and one of the two quantum dots with two classical laser fields. Quantum interference effect with different transition paths is the mechanism responsible with photon blockade. This system has been found to be a tunable source of single or two-photon with applications in solid state quantum computation and quantum information processing.