Efficient generation of energy-tunable entangled photons in a semiconductor microcavity

Oka, Hisaki; Oohata, Goro; Ishihara, Hajime
March 2009
Applied Physics Letters;3/16/2009, Vol. 94 Issue 11, p111113
Academic Journal
A scheme is proposed for the generation of polarization- and frequency-entangled photons in a semiconductor planar microcavity. Photon entanglement can be achieved by converting two lower polariton branches with symmetric in-plane momenta into lower and upper polariton branches with zero in-plane momentum via a biexciton state. The phase-matching condition is satisfied for a microcavity with cavity detuning equal to the biexciton binding energy. The generation efficiency and energy control of the entangled photons are demonstrated for a CuCl microcavity as an example.


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