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Proceedings Paper

Semiconductor quantum dot to fiber coupling system for 1.3 um range
Author(s): Kinga Żołnacz; Wacław Urbańczyk ; Nicole Srocka; Tobias Heuser; David Quandt; André Strittmatter; Sven Rodt; Stephan Reitzenstein; Anna Musiał; Paweł Mrowiński; Grzegorz Sęk; Krzysztof Poturaj; Grzegorz Wójcik; Paweł Mergo; Kamil Dybka; Mariusz Dyrkacz; Michał Dłubek
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Paper Abstract

We present an alignment procedure which allows for precise gluing of a structure with an optically pumped quantum emitter to the end face of zirconia ferrule with a specially fabricated high numerical aperture single-mode fiber. The proposed method is an important step towards building a single-photon source based on an InGaAs quantum dot emitting in 1.3 μm range and located deterministically in a microlens fabricated by in-situ electron beam lithography and plasma etching to improve the photon extraction efficiency. Since single QDs are very dim at room temperature which hinders QD-fiber adjustment by maximizing the collected photoluminescence signal, the developed method uses light back-reflected from the top surface of the sample with microlens as a feedback signal. Using this approach, we were able to position the high-NA fiber over the center of the microlens with an accuracy of about 150 nm in a lateral direction and 50 nm in a vertical direction. The alignment accuracy was confirmed by following the room temperature emission from quantum wells embedded in a reference microlens. We also present initial low temperature tests of the coupling system mounted in a compact and portable Stirling cryocooler.

Paper Details

Date Published: 21 May 2018
PDF: 8 pages
Proc. SPIE 10674, Quantum Technologies 2018, 106741R (21 May 2018); doi: 10.1117/12.2306179
Show Author Affiliations
Kinga Żołnacz, Wrocław Univ. of Science and Technology (Poland)
Wacław Urbańczyk , Wrocław Univ. of Science and Technology (Poland)
Nicole Srocka, Technische Univ. Berlin (Germany)
Tobias Heuser, Technische Univ. Berlin (Germany)
David Quandt, Technische Univ. Berlin (Germany)
André Strittmatter, Technische Univ. Berlin (Germany)
Sven Rodt, Technische Univ. Berlin (Germany)
Stephan Reitzenstein, Technische Univ. Berlin (Germany)
Anna Musiał, Wrocław Univ. of Science and Technology (Poland)
Paweł Mrowiński, Wrocław Univ. of Science and Technology (Poland)
Grzegorz Sęk, Wrocław Univ. of Science and Technology (Poland)
Krzysztof Poturaj, Maria Curie-Sklodowska Univ. (Poland)
Grzegorz Wójcik, Maria Curie-Sklodowska Univ. (Poland)
Paweł Mergo, Maria Curie-Sklodowska Univ. (Poland)
Kamil Dybka, FIBRAIN Sp. z.o.o. (Poland)
Mariusz Dyrkacz, FIBRAIN Sp. z.o.o. (Poland)
Michał Dłubek, FIBRAIN Sp. z.o.o. (Poland)


Published in SPIE Proceedings Vol. 10674:
Quantum Technologies 2018
Jürgen Stuhler; Andrew J. Shields; Miles J. Padgett, Editor(s)

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