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Highly indistinguishable photons from a quantum dot in a microcavity
Author(s) -
Weiler Stefanie,
Ulhaq Ata,
Ulrich Sven M.,
Reitzenstein Stephan,
Löffler Andreas,
Forchel Alfred,
Michler Peter
Publication year - 2011
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201000781
Subject(s) - photon , physics , quantum dot , coherence (philosophical gambling strategy) , coherence time , spontaneous emission , wave packet , quantum entanglement , quantum , optics , atomic physics , quantum mechanics , laser
We investigated the indistinguishability of photons emitted by single self‐assembled (In,Ga)As/GaAs quantum dots (QDs) coupled to the fundamental mode (FM) of a pillar microcavity. By systematic pre‐characterization, optimum conditions with respect to fast radiative decay (Purcell enhancement), long coherence time, and close to background‐free single‐photon emission have been derived. For different spectral detunings between QD and FM emission, Hong‐Ou‐Mandel‐type (HOM) two‐photon interference has been measured as a function of temporal photon wavepacket overlap. Detailed analysis of our data (under consideration of setup limitations) anticipates the generation of highly indistinguishable photons with up to V HOM = 0.82 visibility.