Microfiber-microcavity system for efficient single photon collection

Single photon sources are key components for various quantum information processing. For practical quantum applications, bright single photon sources with efficient fiber-optical interfaces are highly required. Here, bright fiber-coupled single photon sources based on InAs quantum dots are demonstra...

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Veröffentlicht in:Optics express 2016-10, Vol.24 (20), p.23471-23480
Hauptverfasser: Lee, Chang-Min, Lim, Hee-Jin, Lee, Mireu, Schneider, Christian, Maier, Sebastian, Höfling, Sven, Kamp, Martin, Lee, Yong-Hee
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Sprache:eng
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Zusammenfassung:Single photon sources are key components for various quantum information processing. For practical quantum applications, bright single photon sources with efficient fiber-optical interfaces are highly required. Here, bright fiber-coupled single photon sources based on InAs quantum dots are demonstrated through the k-vector matching between a microfiber mode and a normal mode of the linear photonic crystal cavity. One of the modes of the linear photonic crystal cavity whose k-vector is similar to that of the microfiber mode is employed. From independent transmission measurement, the coupling efficiency directly into the fiber of 58% is obtained. When the quantum dot and cavity system is non-resonantly pumped with 80 MHz pulse train, a raw count rate of 1.81 MHz is obtained with g (0) = 0.46. Resonant pump is expected to improve the rather high g (0) value. Time-resolved photoluminescence is also measured to confirm the three-fold Purcell enhancement. This system provides a promising route for efficient direct fiber collections of single photons for quantum information processing.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.24.023471