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Research output: Contribution to Journal/Magazine › Journal article › peer-review
| Article number | 29 |
|---|---|
| <mark>Journal publication date</mark> | 23/02/2006 |
| <mark>Journal</mark> | New Journal of Physics |
| Issue number | 2 |
| Volume | 8 |
| Number of pages | 9 |
| Publication Status | Published |
| <mark>Original language</mark> | English |
We demonstrate the triggered emission of polarization-entangled photon pairs from the biexciton cascade of a single InAs quantum dot embedded in a GaAs/AlAs planar microcavity. Improvements in the sample design blue shifts the wetting layer to reduce the contribution of background light in the measurements. Results presented show that > 70% of the detected photon pairs are entangled. The high fidelity of the (|HXXHX) + |VXXVX])/root 2 state that we determine is sufficient to satisfy numerous tests for entanglement. The improved quality of entanglement represents a significant step towards the realization of a practical quantum dot source compatible with applications in quantum information.