Collecting single photons from a cavity-coupled quantum dot using an adiabatic tapered fiber

Anatole Bach; Antoine Chapuis; Corentin Morin; Richard Hostein; Savvas Germanis; Benoit Eble; Mathieu Bernard; Florent Margaillan; Paola Atkinson; Valia Voliotis; Remy Braive; Kimon Moratis

arXiv · 2410.09832

Collecting single photons from a cavity-coupled quantum dot using an adiabatic tapered fiber

Anatole Bach·Antoine Chapuis·Corentin Morin·Richard Hostein·Savvas Germanis·Benoit Eble·Mathieu Bernard·Florent Margaillan·Paola Atkinson·Valia Voliotis·Remy Braive·Kimon Moratis

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Abstract

We demonstrate efficient in-plane optical fiber collection of single photon emission from quantum dots embedded in photonic crystal cavities. This was achieved via adiabatic coupling between a tapered optical fiber and a tapered on-chip photonic waveguide coupled to the photonic crystal cavity. The collection efficiency of a dot in a photonic crystal cavity was measured to be 5 times greater via the tapered optical fiber compared to collection by a microscope objective lens above the cavity. The single photon source was also characterized by second order photon correlations measurements giving g(2)(0)=0.17 under non-resonant excitation. Numerical calculations demonstrate that the collection efficiency could be further increased by improving the dot-cavity coupling and by increasing the overlap length of the tapered fiber with the on-chip waveguide. An adiabatic coupling of near unity is predicted for an overlap length of 5 microns.

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Anatole Bach, Antoine Chapuis, Corentin Morin, Richard Hostein, Savvas Germanis, Benoit Eble, Mathieu Bernard, Florent Margaillan, Paola Atkinson, Valia Voliotis, Remy Braive, Kimon Moratis. 2024-10-13. Collecting single photons from a cavity-coupled quantum dot using an adiabatic tapered fiber. https://arxiv.org/abs/2410.09832

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