Two Color Blinking of Single Strain-Induced GaAs Quantum Dots

D. Bertram, M. C. Hanna, A. J. Nozik

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Abstract

The photoluminescence spectra of single strain-induced quantum dots (SIQD) in the GaAs/AlGaAs system by means of photoluminescence microscopy is presented. The single SIQD linewidths are much narrower than that of an average over many QDs. Since single SIQDs are produced by stressors of slightly different shape and height, a distribution of ground state energies is observed which produce the average spectrum for multiple QDs. Evidence for excited states of single QDs has been found in the spectra at higher excitation density due to band filling effects. An unusual effect of two color blanking (TCB) of the ground and the excited state luminescence has been observed.

Original languageAmerican English
Pages (from-to)2666-2668
Number of pages3
JournalApplied Physics Letters
Volume74
Issue number18
DOIs
StatePublished - 1999

NREL Publication Number

  • NREL/JA-590-26246

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