Open AccessMethod for direct coupling of a semiconductor quantum dot to an optical fiber for single-photon source applications
Author(s) -
Kinga Żołnacz,
Anna Musiał,
Nicole Srocka,
Jan Große,
Maximilian J Schlösinger,
PhilippImmanuel Schneider,
Oleh Kravets,
Monika Mikulicz,
J. Olszewski,
Krzysztof Poturaj,
Grzegorz Wójcik,
Paweł Mergo,
Kamil Dybka,
Mariusz Dyrkacz,
Michał Dłubek,
Sven Rodt,
Sven Burger,
Lin Zschiedrich,
G. Sęk,
Stephan Reitzenstein,
Wacław Urbańczyk
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.026772
Subject(s) - materials science , optics , quantum dot , fiber , optical fiber , single mode optical fiber , optoelectronics , photon , photonic crystal fiber , single photon source , coupling (piping) , physics , metallurgy , composite material
We present an effective method for direct fiber coupling of a quantum dot (QD) that is deterministically incorporated into a cylindrical mesa. For precise positioning of the fiber with respect to the QD-mesa, we use a scanning procedure relying on interference of light reflected back from the fiber end-face and the top surface of the mesa, applicable for both single-mode and multi-mode fibers. The central part of the fiber end-face is etched to control the required distance between the top surface of the mesa and the fiber core. Emission around 1260 nm from a fiber-coupled InGaAs/GaAs QD is demonstrated and its stability is proven over multiple cooling cycles. Moreover, a single photon character of emission from such system for a line emitting above 1200 nm is proven experimentally by photon autocorrelation measurements with an obtained value of the second order correlation function at zero time-delay well below 0.5.