2004/07/16 by S. M. Ulrich, Mohamed Benyoucef, M. Benyoucef +14 · 40 citations
Engineering · Physics and Astronomy · #Atomic physics #Molecular Junctions and Nanostructures #Near-Field Optical Microscopy #Photon #Physics #Quantum dot #Quantum mechanics #Semiconductor Quantum Structures and Devices #cond-mat.other
paper · pdf · doi:10.1103/physrevb.71.235328
published in Physical Review B 71(23) (American Physical Society) · 5 pages, 3 figures, submitted for publication
arxiv created 2004/07/16 · openalex publication_date 2005/06/27 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The optical creation and recombination of charged biexciton and trion complexes in an (In,Ga)As∕GaAs quantum dot is investigated by microphotoluminescence spectroscopy. Under the condition of quasiresonant pulsed excitation into the p shell we find nearly background-free photoluminescence from single quantum dots where multiple-photon (>1) emission is fully suppressed. This reflects almost perfect triggered single-photon emission. Photon cross-correlation measurements demonstrate the temporally correlated decay of charged biexciton and trion states. Our calculations provide strong evidence for radiative decay from the excited trion state, thus indicating a long-lived p-electron spin configuration.