Time resolved emission at 1.3 micrometers of a single InAs quantum dot by using a tunable fibre Bragg grating

Abstract

[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