Journal article Open Access

Quantum Dots for Single- and Entangled-Photon Emitters

Bimberg, Dieter; Stock, Erik; Lochmann, Anatol; Schliwa, Andrei; Tofflinger, J. A.; Unrau, Waldemar; Munnix, M.; Rodt, Sven; Toropov, Aleksandr I.; Bakarov, Askhat; Haisler, Vladimir A.; Kalagin, Aleksandr K.


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  <identifier identifierType="DOI">10.1109/jphot.2009.2025329</identifier>
  <creators>
    <creator>
      <creatorName>Bimberg, Dieter</creatorName>
    </creator>
    <creator>
      <creatorName>Stock, Erik</creatorName>
    </creator>
    <creator>
      <creatorName>Lochmann, Anatol</creatorName>
    </creator>
    <creator>
      <creatorName>Schliwa, Andrei</creatorName>
    </creator>
    <creator>
      <creatorName>Tofflinger, J. A.</creatorName>
    </creator>
    <creator>
      <creatorName>Unrau, Waldemar</creatorName>
    </creator>
    <creator>
      <creatorName>Munnix, M.</creatorName>
    </creator>
    <creator>
      <creatorName>Rodt, Sven</creatorName>
    </creator>
    <creator>
      <creatorName>Toropov, Aleksandr I.</creatorName>
    </creator>
    <creator>
      <creatorName>Bakarov, Askhat</creatorName>
    </creator>
    <creator>
      <creatorName>Haisler, Vladimir A.</creatorName>
    </creator>
    <creator>
      <creatorName>Kalagin, Aleksandr K.</creatorName>
    </creator>
  </creators>
  <titles>
    <title>Quantum Dots For Single- And Entangled-Photon Emitters</title>
  </titles>
  <publisher>Zenodo</publisher>
  <publicationYear>2009</publicationYear>
  <dates>
    <date dateType="Issued">2009-07-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://zenodo.org/record/896351</alternateIdentifier>
  </alternateIdentifiers>
  <rightsList>
    <rights rightsURI="https://creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution Share-Alike 4.0</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">The efficient generation of polarized single or entangled photons is a crucial requirement for the implementation of quantum key distribution (QKD) systems. Self-organized semiconductor quantum dots (QDs) are capable of emitting one polarized photon or an entangled photon pair at a time using appropriate electrical current injection. We realized a highly efficient single-photon source (SPS) based on well-established semiconductor technology: In a pin structure, a single electron and a single hole are funneled into a single InAs QD using a submicron AlOx current aperture. Efficient radiative recombination leads to emission of single polarized photons with an all-time record purity of the spectrum. Non-classicality of the emitted light without using additional spectral filtering is demonstrated. The out-coupling efficiency and the emission rate are increased by embedding the SPS into a micro-cavity. The design of the micro-cavity is based on detailed modeling to optimize its performance. The resulting resonant single-QD diode is driven at a repetition rate of 1 GHz, exhibiting a second-order correlation function of g(2)(0) = 0. Eventually, QDs grown on (111)-oriented substrates are proposed as a source of entangled photon pairs. Intrinsic symmetry-lowering effects leading to the splitting of the exciton bright states are shown to be absent for this substrate orientation. As a result, the XX rarr X rarr 0 recombination cascade of a QD can be used for the generation of entangled photons without further tuning of the fine-structure splitting via QD size and/or shape.</description>
  </descriptions>
</resource>

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