Biexciton cascade in telecommunication wavelength quantum dots

M. B. Ward; P. M. Intallura; C. M. Natarajan; R. H. Hadfield; P. Atkinson; Z. L. Yuan; S. Miki; M. Fujiwara; M. Sasaki; Z. Wang; B. Baek; S. W. Nam; D. A. Ritchie; A. J. Shields

doi:10.1088/1742-6596/210/1/012036

Biexciton cascade in telecommunication wavelength quantum dots

M. B. Ward, P. M. Intallura, C. M. Natarajan, R. H. Hadfield, P. Atkinson, Z. L. Yuan, S. Miki, M. Fujiwara, M. Sasaki, Z. Wang, B. Baek, S. W. Nam, D. A. Ritchie, A. J. Shields

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We report on polarisation correlation from the cascaded recombination of biexcitons in a quantum dot emitting at a telecommunication wavelength. The fine structure splitting of the exciton state in this InAs/GaAs quantum dot is of the order of 100 µeV and polarisation correlation is expected. Strong polarisation correlation between the biexciton and exciton emission lines is observed under both continuous wave (CW) and pulsed laser excitation so telecom wavelength quantum dots with lower energy splittings could be suitable for entangled photon pair generation. Measurements were performed using nanowire superconducting single photon detectors (SSPDs). SSPDs offer low time-jitter and improve the resolution of features in the correlation spectra, including the asymmetric dip and peak resulting from the cascaded emission with the peak extending more than an order of magnitude above the Poissonian level. © 2010 IOP Publishing Ltd.

Original language	English
Article number	012036
Journal	Journal of Physics: Conference Series
Volume	210
DOIs	https://doi.org/10.1088/1742-6596/210/1/012036
Publication status	Published - 2010

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@article{3c06656f9aa740c69ab1a9ea4c47bacf,

title = "Biexciton cascade in telecommunication wavelength quantum dots",

abstract = "We report on polarisation correlation from the cascaded recombination of biexcitons in a quantum dot emitting at a telecommunication wavelength. The fine structure splitting of the exciton state in this InAs/GaAs quantum dot is of the order of 100 µeV and polarisation correlation is expected. Strong polarisation correlation between the biexciton and exciton emission lines is observed under both continuous wave (CW) and pulsed laser excitation so telecom wavelength quantum dots with lower energy splittings could be suitable for entangled photon pair generation. Measurements were performed using nanowire superconducting single photon detectors (SSPDs). SSPDs offer low time-jitter and improve the resolution of features in the correlation spectra, including the asymmetric dip and peak resulting from the cascaded emission with the peak extending more than an order of magnitude above the Poissonian level. {\textcopyright} 2010 IOP Publishing Ltd.",

author = "Ward, {M. B.} and Intallura, {P. M.} and Natarajan, {C. M.} and Hadfield, {R. H.} and P. Atkinson and Yuan, {Z. L.} and S. Miki and M. Fujiwara and M. Sasaki and Z. Wang and B. Baek and Nam, {S. W.} and Ritchie, {D. A.} and Shields, {A. J.}",

year = "2010",

doi = "10.1088/1742-6596/210/1/012036",

language = "English",

volume = "210",

journal = "Journal of Physics: Conference Series",

issn = "1742-6588",

publisher = "IOP Publishing ",

}

TY - JOUR

T1 - Biexciton cascade in telecommunication wavelength quantum dots

AU - Ward, M. B.

AU - Intallura, P. M.

AU - Natarajan, C. M.

AU - Hadfield, R. H.

AU - Atkinson, P.

AU - Yuan, Z. L.

AU - Miki, S.

AU - Fujiwara, M.

AU - Sasaki, M.

AU - Wang, Z.

AU - Baek, B.

AU - Nam, S. W.

AU - Ritchie, D. A.

AU - Shields, A. J.

PY - 2010

Y1 - 2010

N2 - We report on polarisation correlation from the cascaded recombination of biexcitons in a quantum dot emitting at a telecommunication wavelength. The fine structure splitting of the exciton state in this InAs/GaAs quantum dot is of the order of 100 µeV and polarisation correlation is expected. Strong polarisation correlation between the biexciton and exciton emission lines is observed under both continuous wave (CW) and pulsed laser excitation so telecom wavelength quantum dots with lower energy splittings could be suitable for entangled photon pair generation. Measurements were performed using nanowire superconducting single photon detectors (SSPDs). SSPDs offer low time-jitter and improve the resolution of features in the correlation spectra, including the asymmetric dip and peak resulting from the cascaded emission with the peak extending more than an order of magnitude above the Poissonian level. © 2010 IOP Publishing Ltd.

AB - We report on polarisation correlation from the cascaded recombination of biexcitons in a quantum dot emitting at a telecommunication wavelength. The fine structure splitting of the exciton state in this InAs/GaAs quantum dot is of the order of 100 µeV and polarisation correlation is expected. Strong polarisation correlation between the biexciton and exciton emission lines is observed under both continuous wave (CW) and pulsed laser excitation so telecom wavelength quantum dots with lower energy splittings could be suitable for entangled photon pair generation. Measurements were performed using nanowire superconducting single photon detectors (SSPDs). SSPDs offer low time-jitter and improve the resolution of features in the correlation spectra, including the asymmetric dip and peak resulting from the cascaded emission with the peak extending more than an order of magnitude above the Poissonian level. © 2010 IOP Publishing Ltd.

U2 - 10.1088/1742-6596/210/1/012036

DO - 10.1088/1742-6596/210/1/012036

M3 - Article

SN - 1742-6588

VL - 210

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

M1 - 012036

ER -

Biexciton cascade in telecommunication wavelength quantum dots

Abstract

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