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

Research output: Contribution to journalArticle

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 languageEnglish
Article number012036
JournalJournal of Physics: Conference Series
Volume210
DOIs
Publication statusPublished - 2010

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telecommunication
cascades
quantum dots
wavelengths
photons
polarization
excitons
detectors
continuous wave lasers
pulsed lasers
nanowires
fine structure
vibration
excitation
energy

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Ward, M. B., Intallura, P. M., Natarajan, C. M., Hadfield, R. H., Atkinson, P., Yuan, Z. L., ... Shields, A. J. (2010). Biexciton cascade in telecommunication wavelength quantum dots. Journal of Physics: Conference Series, 210, [012036]. https://doi.org/10.1088/1742-6596/210/1/012036
Ward, M. B. ; Intallura, P. M. ; Natarajan, C. M. ; Hadfield, R. H. ; Atkinson, P. ; Yuan, Z. L. ; Miki, S. ; Fujiwara, M. ; Sasaki, M. ; Wang, Z. ; Baek, B. ; Nam, S. W. ; Ritchie, D. A. ; Shields, A. J. / Biexciton cascade in telecommunication wavelength quantum dots. In: Journal of Physics: Conference Series. 2010 ; Vol. 210.
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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. {\circledC} 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.}",
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Ward, MB, Intallura, PM, Natarajan, CM, Hadfield, RH, Atkinson, P, Yuan, ZL, Miki, S, Fujiwara, M, Sasaki, M, Wang, Z, Baek, B, Nam, SW, Ritchie, DA & Shields, AJ 2010, 'Biexciton cascade in telecommunication wavelength quantum dots', Journal of Physics: Conference Series, vol. 210, 012036. https://doi.org/10.1088/1742-6596/210/1/012036

Biexciton cascade in telecommunication wavelength quantum dots. / Ward, M. B.; Intallura, P. M.; Natarajan, C. M.; Hadfield, R. H.; Atkinson, P.; Yuan, Z. L.; Miki, S.; Fujiwara, M.; Sasaki, M.; Wang, Z.; Baek, B.; Nam, S. W.; Ritchie, D. A.; Shields, A. J.

In: Journal of Physics: Conference Series, Vol. 210, 012036, 2010.

Research output: Contribution to journalArticle

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

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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

VL - 210

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

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Ward MB, Intallura PM, Natarajan CM, Hadfield RH, Atkinson P, Yuan ZL et al. Biexciton cascade in telecommunication wavelength quantum dots. Journal of Physics: Conference Series. 2010;210. 012036. https://doi.org/10.1088/1742-6596/210/1/012036