Enhanced single-photon emission from a quantum dot in a micropost microcavity

Details Enhanced single-photon emission from a quantum dot in a micropost microcavity Enhanced single-photon emission from a quantum dot in a micropost microcavity

2003-07-03

arxiv.org/abs/quant-ph/0307025v1

Applied Physics Letters, vol. 82, pp. 3596-3598, May 2003

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1063/1.1577828

We demonstrate a single-photon source based on a quantum dot in a micropost microcavity that exhibits a large Purcell factor together with a small multi-photon probability. For a quantum dot on resonance with the cavity, the spontaneous emission rate is increased by a factor of five, while the probability to emit two or more photons in the same pulse is reduced to 2% compared to a Poisson-distributed source of the same intensity. In addition to the small multi-photon probability, such a strong Purcell effect is important in a single-photon source for improving the photon outcoupling efficiency and the single-photon generation rate, and for bringing the emitted photon pulses closer to the Fourier transform limit.

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