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arXiv · 1901.00469

Monolithic integration of single photon sources via evanescent coupling of tapered InP nanowires to SiN waveguides

Khaled Mnaymneh·Dan Dalacu·Joseph McKee·Jean Lapointe·Sofiane Haffouz·Philip J. Poole·Geof C. Aers·Robin L. Williams
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Abstract

We demonstrate a method to monolithically integrate nanowire-based quantum dot single photon sources on-chip using evanescent coupling. By deterministically placing an appropriately tapered III-V nanowire waveguide, containing a single quantum dot, on top of a silicon-based ridge waveguide, the quantum dot emission can be transferred to the ridge waveguide with calculated efficiencies close to 100%. As the evanescent coupling is bidirectional, the source can be optically pumped in both free-space and through the ridge waveguide. The latter onfiguration provides a self-contained, all-fiber, single photon source suitable as a plug-and-play solution for applications requiring bright, on-demand single photons. Using InAsP quantum dots embedded in InP nanowire waveguides, we demonstrate coupling efficiencies to a SiN ridge waveguide of 74% with a single photon purity of 97%.

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Khaled Mnaymneh, Dan Dalacu, Joseph McKee, Jean Lapointe, Sofiane Haffouz, Philip J. Poole, Geof C. Aers, Robin L. Williams. 2018-12-08. Monolithic integration of single photon sources via evanescent coupling of tapered InP nanowires to SiN waveguides. https://doi.org/10.1002/qute.201900021

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