6533b7ddfe1ef96bd1274035
RESEARCH PRODUCT
Time resolved emission at 1.3 μm of a single InAs quantum dot by using a tunable fibre Bragg grating
Carlos R. Fernández-pousaDavid BarreraAmelia Lavinia RicchiutiPaola FrigeriJuan P. Martínez-pastorGuillermo Muñoz-matutanoGiovanna TrevisiL. SeravalliSalvador SalesD. Rivassubject
single quantum dot time resolved spectroscopy fibre Bragg grating excitonsPhotoluminescenceMaterials scienceexcitonsExcitonfibre Bragg gratingPhysics::OpticsBioengineeringGratinglaw.inventionCondensed Matter::Materials ScienceFiber Bragg gratinglawGeneral Materials ScienceElectrical and Electronic EngineeringBiexcitonMonochromatorWetting layerCondensed Matter::Quantum Gasesbusiness.industryCondensed Matter::OtherMechanical EngineeringGeneral ChemistryCondensed Matter::Mesoscopic Systems and Quantum Hall Effectsingle quantum dottime resolved spectroscopyMechanics of MaterialsQuantum dotOptoelectronicsbusinessdescription
Photoluminescence and time resolved photoluminescence from single metamorphic InAs/GaAs quantum dots (QDs) emitting at 1.3 mu m have been measured by means of a novel fibre-based characterization set-up. We demonstrate that the use of a wavelength tunable fibre Bragg grating filter increases the light collection efficiency by more than one order of magnitude as compared to a conventional grating monochromator. We identified single charged exciton and neutral biexciton transitions in the framework of a random population model. The QD recombination dynamics under pulsed excitation can be understood under the weak quantum confinement potential limit and the interaction between carriers at the wetting layer and QD states.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-12-20 |