[EN] Photoluminescence and time resolved photoluminescence from single metamorphic
InAs/GaAs quantum dots (QDs) emitting at 1.3 micrometers 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.G Munoz-Matutano appreciates valuable help from Professor Miguel Andres (University of Valencia) and thanks the Spanish Juan de la Cierva program (JCI-2011-10686). We acknowledge the support of the FEDER actions UPVOV08-3E-008 and UPVOV10-3E-492, the PROMETEO2009/74
project from Generalitat Valenciana, the Spanish projects TEC2011-29120-C05-01-02-05, the Italian FIRB
Project ‘Nanotecnologie e Nanodispositivi per la Societa` dell’Informazione’ and ‘SANDiE’ Network of Excellence of EC, Contract No. NMP4-CT-2004-500101.Muñoz Matutano, G.; Rivas, D.; Ricchiuti, AL.; Barrera Vilar, D.; Fernández Pousa, CR.; Martínez Pastor, J.; Seravalli, L.... (2014). Time resolved emission at 1.3 micrometers of a single InAs quantum dot by using a tunable fibre Bragg grating. Nanotechnology. 25(3):35204-1-35204-7. https://doi.org/10.1088/09574484/25/3/035204S35204-135204-725