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High performance single photon sources from photolithographically defined pillar microcavities

2005; Optica Publishing Group; Volume: 13; Issue: 1 Linguagem: Inglês

10.1364/opex.13.000050

1094-4087

A. J. Bennett, D. C. Unitt, P. Atkinson, D. A. Ritchie, A. J. Shields,

Semiconductor Lasers and Optical Devices

We demonstrate that single photons can be generated from single InAs/GaAs quantum dots in photolithographically defined pillar microcavities.Pillars with a 1.9 µm diameter cavity show a four fold enhancement in the radiative decay rate due to the Purcell effect and a photon collection efficiency into a lens of up to 10%.Measurements of the second order correlation function reveal a greater than fifty fold reduction in the multi-photon emission rate compared to a laser of the same intensity.