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Two-photon interference from remote quantum dots with inhomogeneously broadened linewidths

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Hoefling_2014_PRB_Two_photon_Final_Pub_Vers.pdf (1.174Mb)
Date
27/01/2014
Author
Gold, P.
Thoma, A.
Maier, S.
Reitzenstein, S.
Schneider, C.
Hoefling, S.
Kamp, M.
Keywords
Single-photon source
Device
Indistinguishability
Teleportation
Entanglement
Emission
QC Physics
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Abstract
In this paper, we study the influence of quasiresonant and nonresonant excitation on the interference properties of single photons emitted from quantum dots (QDs). The quasiresonant excitation scheme leads to an increase of interference visibility of photons emitted from the same QD to 69% compared to 12% for nonresonant excitation. Furthermore, we demonstrate quantum interference of photons emitted from separate QDs which are simultaneously excited into their p shell. We can readily extract a two-photon interference visibility as high as (39 ± 2)% for nonpostselected coincidences exceeding the predicted value based on coherence and radiative decay times of the quantum dot emission (similar to 25%). We account for this observation by treating the emission of both quantum dots as inhomogeneously broadened ensembles of Fourier-limited photons and observe good congruence between experiment and model.
Citation
Gold , P , Thoma , A , Maier , S , Reitzenstein , S , Schneider , C , Hoefling , S & Kamp , M 2014 , ' Two-photon interference from remote quantum dots with inhomogeneously broadened linewidths ' , Physical Review. B, Condensed matter and materials physics , vol. 89 , no. 3 , 035313 . https://doi.org/10.1103/PhysRevB.89.035313
Publication
Physical Review. B, Condensed matter and materials physics
Status
Peer reviewed
DOI
https://doi.org/10.1103/PhysRevB.89.035313
ISSN
1098-0121
Type
Journal article
Rights
©2014 American Physical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at https://dx.doi.org/10.1103/PhysRevB.89.035313.
Description
This work was financially supported by the German Ministry of Education and Research (BMBF) via the project QuaHL-Rep and by the State of Bavaria.
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/8172

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