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Fibre-coupled semiconductor single-photon source for secure quantum-communication in the 1.3 µm range


The project's ultimate goal is to develop a practical and efficient single-photon source with an optically excited semiconductor quantum dot as an emitter, which will provide single photons on demand and will be suitable for local-area secure data transfer (e.g., quantum key distribution - QKD) in the 2nd telecommunication window (1.3 µm range).

The project is part of the 2nd 'Poland - Berlin' call "Photonic Components and Systems for Production und Measurement in the fields of Communication, Medicine, Lighting and Security".


JCMwave GmbH, Berlin, Germany

PicoQuant GmbH, Berlin, Germany

Wroclaw University of Technology, Wroclaw, Poland

Marie Curie-Skłodowska University, Lublin, Poland

P.H. ELMAT Sp. z. o.o., Rzeszow, Poland


Funded by:

European Regional Development Fund (EFRE) of the European Union in the framework of the programme to promote research, innovation and technologies (Pro FIT).


P. Holewa et al., Thermal stability of emission from single InGaAs/GaAs quantum dots at the telecom O-band, Sci Rep 10, 21816 (2020)
N. Srocka et al., Deterministically fabricated strain-tunable quantum dot single-photon sources emitting in the telecom O-band, Applied Physics Letters 117, 224001 (2020)
A. Musial et al., Plug&play fibre-coupled 73 kHz single-photon source operating in the telecom O-band, Advanced Quantum Technologies, 2000018 (2020)
N. Srocka et al., Deterministically fabricated quantum dot single-photon source emitting indistinguishable photons in the telecom O-band, Appl. Phys. Lett. 116, 231104 (2020)
P. Podemski et al., Interplay between emission wavelength and s-p splitting in MOCVD-grown InGaAs/GaAs quantum dots emitting above 1.3 μm, Applied Physics Letters 116, 023102 (2020)
P. Mrowiński et al., Excitonic complexes in MOCVD-grown InGaAs/GaAs quantum dots emitting at telecom wavelengths, Phys. Rev. B 100, 115310 (2019)
K. Żołnacz et al., Method for direct coupling of a semiconductor quantum dot to an optical fiber for single-photon source applications, Opt. Express 27, 26772-26785 (2019)
P. Podemski et al., Tailoring the emission wavelength and s-p splitting in MOCVD-grown InGaAs/GaAs quantum dots emitting above 1.3 µm, ArXiv e-prints, 1908.05206 (2019)
N. Srocka et al., Enhanced photon-extraction efficiency from InGaAs/GaAs quantum dots in deterministic photonic structures at 1.3 μm fabricated by in-situ electron-beam lithography, AIP Advances 8, 085205 (2018)
P.-I. Schneider et al., Numerical optimization of the extraction efficiency of a quantum-dot based single-photon emitter into a single-mode fiber, Opt. Express, OSA, 26, 8479-8492 (2018)
S. Fischbach et al.,Single Quantum Dot with Microlens and 3D-Printed Micro-objective as Integrated Bright Single-Photon Source, ACS Photonics 4, 1327-1332 (2017)

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