Random telegraph noise in the photon emission from semiconductor quantum dots

Mats-Erik Pistol, Nikolay Panev, P Castrillo, Dan Hessman, Lars Samuelson, Werner Seifert, V Evtikhiev, A Katznelson, E Kotelnikov

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review


This study has observed and investigated random telegraph noise in the photoluminescence from InAs quantum dots in GaAs and InP quantum dots in GaInP. The dots are grown by the Stranski-Krastanow technique with a sufficiently low surface density that individual dots easily could be investigated. The luminescence from many single quantum dots, exhibiting switching between two levels, has been spectrally resolved as a function of time. The random telegraph noise is only observed in the presence of band filling. Results show no spectral shift of the emission in the different states. It is only the intensity, mainly for higher energy peaks that changes. The InAs quantum dots behave very similarly to InP/GaInP and InGaAs/GaAs quantum dots with respect to random telegraph noise. The similarities between the different systems argue for a common mechanism behind the blinking. Experiments are performed where the switching behaviour is changed in all the different systems supporting the idea that non-radiative defects are responsible
Original languageEnglish
Title of host publication2005 European Quantum Electronics Conference
PublisherIEEE - Institute of Electrical and Electronics Engineers Inc.
ISBN (Print)0-7803-8973-5
Publication statusPublished - 2005
Event2005 European Quantum Electronics Conference - Munich, Germany
Duration: 2005 Jun 122005 Jun 17


Conference2005 European Quantum Electronics Conference

Subject classification (UKÄ)

  • Condensed Matter Physics

Free keywords

  • switching behaviour
  • nonradiative defects
  • InAs-GaAs-InP-GaInP
  • band filling
  • surface density
  • Stranski-Krastanow technique
  • quantum dots
  • photoluminescence
  • semiconductor quantum dots
  • random telegraph noise
  • photon emission


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