Efficient coupling of single photons to ridge-waveguide photonic integrated circuits

S. Fattah Poor*, T. B. Hoang, L. Midolo, C. P. Dietrich, L. H. Li, E. H. Linfield, J. F. P. Schouwenberg, T. Xia, F. M. Pagliano, F. W. M. van Otten, A. Fiore

*Corresponding author for this work

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24 Citations (Scopus)


We demonstrate the efficient coupling of single photons emitted by single quantum dots (QDs) in a photonic crystal cavity (PhCC) to a ridge waveguide (RWG). Using a single-step lithographic process with an optimized tapering, up to 70% coupling efficiency between the photonic crystal waveguide and the RWG was achieved. The emission enhancement of single QDs inside an in-line PhCC coupled via the RWG to a single-mode fiber was observed. Single-photon funneling rates around 3.5 MHz from a single QD into the RWG were obtained. This result is a step toward the realization of a fully functional quantum photonic integrated circuit. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4799669]

Original languageEnglish
Article number131105
Number of pages5
JournalApplied Physics Letters
Issue number13
Publication statusPublished - 1 Apr 2013




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