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arXiv · 1602.08363

On-chip interference of single photons from an embedded quantum dot and an external laser

Nikola Prtljaga·Christopher Bentham·John O'Hara·Ben Royall·Edmund Clarke·Luke R Wilson·Maurice S Skolnick·A Mark Fox
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Abstract

In this work, we demonstrate the on-chip two-photon interference between single photons emitted by a single self-assembled InGaAs quantum dot and an external laser. The quantum dot is embedded within one arm of an air-clad directional coupler which acts as a beam-splitter for incoming light. Photons originating from an attenuated external laser are coupled to the second arm of the beam-splitter and then combined with the quantum dot photons, giving rise to two-photon quantum interference between dissimilar sources. We verify the occurrence of on-chip Hong-Ou-Mandel interference by cross-correlating the optical signal from the separate output ports of the directional coupler. This experimental approach allows us to use classical light source (laser) to assess in a single step the overall device performance in the quantum regime and probe quantum dot photon indistinguishability on application realistic time scales.

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Nikola Prtljaga, Christopher Bentham, John O'Hara, Ben Royall, Edmund Clarke, Luke R Wilson, Maurice S Skolnick, A Mark Fox. 2016-06-09. On-chip interference of single photons from an embedded quantum dot and an external laser. https://doi.org/10.1063/1.4954220

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