InP-substrate-based quantum dashes on a DBR as single-photon emitters at the third telecommunication window

Paweł Wyborski*, Anna Musiał, Paweł Mrowiński, Paweł Podemski, Vasilij Baumann, Piotr Wroński, Fauzia Jabeen, Sven Höfling, Grzegorz Sęk

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We investigated emission properties of photonic structures with InAs/InGaAlAs/InP quantum dashes grown by molecular beam epitaxy on a distributed Bragg reflector. In high-spatial-resolution photoluminescence experiment, well-resolved sharp spectral lines are observed and single-photon emission is detected in the third telecommunication window characterized by very low multiphoton events probabilities. The photoluminescence spectra measured on simple photonic structures in the form of cylindrical mesas reveal significant intensity enhancement by a factor of 4 when compared to a planar sample. These results are supported by simulations of the electromagnetic field distribution, which show emission extraction efficiencies even above 18% for optimized designs. When combined with relatively simple and undemanding fabrication approach, it makes this kind of structures competitive with the existing solutions in that spectral range and prospective in the context of efficient and practical single-photon sources for fiber-based quantum networks applications.
Original languageEnglish
Article number759
Number of pages12
JournalMaterials
Volume14
Issue number4
DOIs
Publication statusPublished - 4 Feb 2021

Keywords

  • Extraction efficiency
  • III–V quantum dot
  • Photonic structure
  • Single-photon emitter
  • Telecommunication spectral range

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