G. J. Beirne
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View article: Polarization anisotropic luminescence of tunable single lateral quantum dot molecules
Polarization anisotropic luminescence of tunable single lateral quantum dot molecules Open
We investigate the photoluminescence polarization anisotropy of self-assembled individual lateral InGaAs/GaAs quantum dot molecules. In contrast to similarly grown single quantum dots, the dot molecules exhibit a remarkable degree of linea…
View article: Influence of the charge carrier tunneling processes on the recombination dynamics in single lateral quantum dot molecules
Influence of the charge carrier tunneling processes on the recombination dynamics in single lateral quantum dot molecules Open
We report on the charge carrier dynamics in single lateral quantum dot\nmolecules and the effect of an applied electric field on the molecular states.\nControllable electron tunneling manifests itself in a deviation from the\ntypical excit…
View article: Enhanced photoluminescence from self-organized rubrene single crystal surface structures
Enhanced photoluminescence from self-organized rubrene single crystal surface structures Open
We report on crystalline pyramidal structures grown via self-organization on the rubrene (001) surface. The analysis of their spectral response by means of photoluminescence with micrometer lateral resolution reveals an intensity enhanceme…
View article: Influence of the Exciton Dark State on the Optical and Quantum Optical Properties of Single Quantum Dots
Influence of the Exciton Dark State on the Optical and Quantum Optical Properties of Single Quantum Dots Open
The optical properties of single InP/GaInP quantum dots are strongly affected by the dark exciton state. The exciton intensity and decay time are strongly reduced at low temperatures. Additionally, memory effects have been observed in seco…
View article: Electrically pumped single-photon emission up to 80 K—Towards a commercial single-photon emitting device
Electrically pumped single-photon emission up to 80 K—Towards a commercial single-photon emitting device Open
We report electically pumped single‐photon emission in the visible spectral range up to 80 K using InP quantum dots embedded in AlGaInP barriers. In order to confirm that the emission is from a single quantum dot we performed second‐order …
View article: Polarization fine structure and enhanced single-photon emission of self-assembled lateral InGaAs quantum dot molecules embedded in a planar microcavity
Polarization fine structure and enhanced single-photon emission of self-assembled lateral InGaAs quantum dot molecules embedded in a planar microcavity Open
Single lateral InGaAs quantum dot molecules have been embedded in a planar microcavity in order to increase the luminescence extraction efficiency. Using a combination of metal-organic vapor phase and molecular beam epitaxy samples could b…
View article: InP‐quantum dots in Al<sub>0.20</sub>Ga<sub>0.80</sub>InP with different barrier configurations
InP‐quantum dots in Al<sub>0.20</sub>Ga<sub>0.80</sub>InP with different barrier configurations Open
Systematic ensemble photoluminescence studies have been performed on type‐I InP‐quantum dots in Al 0.20 Ga 0.80 InP barriers, emitting at approximately 1.85 eV at 5 K. The influence of different barrier configurations as well as the incorp…
View article: Exciton Dynamics on Rubrene (001) Crystal Surfaces with Microstructure Confinement
Exciton Dynamics on Rubrene (001) Crystal Surfaces with Microstructure Confinement Open
The exciton dynamics on flat (001) rubrene crystal surfaces have been compared with those under confined pyramidal geometry by time-resolved photoluminescence with micrometer spatial resolution. The luminescence spectra can be interpreted …
View article: Towards deterministically controlled InGaAs/GaAs lateral quantum dot molecules
Towards deterministically controlled InGaAs/GaAs lateral quantum dot molecules Open
We report on the fabrication, detailed characterization and modeling of lateral InGaAs quantum dot molecules (QDMs) embedded in a GaAs matrix and we discuss strategies to fully control their spatial configuration and electronic properties.…