12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Controlling the polarization correlation of pho...
View graph of relations

Text available via DOI:

« Back

Controlling the polarization correlation of photon pairs from a charge-tunable quantum dot

Research output: Contribution to journalJournal article

Published

  • R. J. Young
  • S. J. Dewhurst
  • R. M. Stevenson
  • A. J. Shields
  • P. Atkinson
  • K. Cooper
  • D. A. Ritchie
Article number011114
Journal publication date2/07/2007
JournalApplied Physics Letters
Journal number1
Volume91
Number of pages3
Pages-
Original languageEnglish

Abstract

Correlation between the rectilinear polarizations of the photons emitted from the biexciton decay in a single quantum dot is investigated in a device which allows the charge state of the dot to be controlled. Optimizing emission from the neutral exciton states maximizes the operating efficiency of the biexciton decay. This is important for single dot applications such as a triggered source of entangled photons. As the bias on the device is reduced correlation between the two photons is found to fall dramatically as emission from the negatively charged exciton becomes significant. Lifetime measurements demonstrate that electronic spin-scattering is the likely cause. (c) 2007 American Institute of Physics.