Electrically-driven spontaneous emission spectrum of a single quantum dot

David M.T. Kuo, Yia Chung Chang

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


We present theoretical studies on the spontaneous emission spectrum of a single self-assembled InAs/GaAs quantum dot (SAQD) embedded in a p-n junction under bias via Keldysh's non-equilibrium Green's function method. For this open system, the emission spectrum can display four coexisting peaks, corresponding to the recombination of exciton, positive and negative trions, and biexciton, even though there is only a single quantum dot. The integrated intensities of the exciton and biexciton peaks increase, respectively, linearly and quadratically with tunnelling rates.

Original languageEnglish
Pages (from-to)690-699
Number of pages10
JournalJournal of the Physical Society of Japan
Issue number2
StatePublished - Feb 2005


  • Green function
  • Quantum dot
  • Single photon
  • Tunnelling rate


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