Deterministic giant photon phase shift from a single charged quantum dot

Quantum dots (QDs) can be incorporated into solid state photonic devices such as cavities or waveguides that enhance the light-matter interaction. A near unit efficiency light-matter interaction is essential for deterministic, scalable quantum information devices [1]. In this limit, a single photon input into the device will undergo a large rotation of the polarization of the light field due to the strong interaction with the QD. In the past preliminary results have indicated that a low quality-factor (Q∼290) pillar microcavity possesses a high s-factor and that the instantaneous interactions should be deterministic and with high fidelity [2].