0000000000409695

AUTHOR

David Barrera

showing 3 related works from this author

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

2013

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 …

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 dotOptoelectronicsbusiness
researchProduct

Parallel Recording of Single Quantum Dot Optical Emission Using Multicore Fibers

2016

Single Indium Arsenide Quantum Dot emission spectra have been recorded using a four-core, crosstalk-free, multicore fiber placed at the collection arm of a confocal microscope. We developed two different measurement set-ups depending on the relative configuration of the excitation and collection spots. In the single-matched mode, the emission from the excited area is collected by a single core in the multicore fiber, whereas the three remaining cores capture the emission from neighboring, non-excited areas. This procedure allows for the recording of the Quantum Dot emission from carrier diffusion between sample positions separated by more than 6 μm. In the multiple-matched mode, the ex…

Optical fiberMicroscopeMaterials science02 engineering and technologylaw.inventionSingle Quantum Dotchemistry.chemical_compound020210 optoelectronics & photonicsOpticslawTEORIA DE LA SEÑAL Y COMUNICACIONES0202 electrical engineering electronic engineering information engineeringMulticore fibersEmission spectrumStimulated emissionElectrical and Electronic EngineeringSpectroscopybusiness.industry021001 nanoscience & nanotechnologyAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic MaterialschemistryQuantum dot laserQuantum dotExcited stateOptoelectronicsIndium arsenide0210 nano-technologybusiness
researchProduct

All-Optical Fiber Hanbury Brown & Twiss Interferometer to study 1300 nm single photon emission of a metamorphic InAs Quantum Dot

2016

[EN] New optical fiber based spectroscopic tools open the possibility to develop more robust and efficient characterization experiments. Spectral filtering and light reflection have been used to produce compact and versatile fiber based optical cavities and sensors. Moreover, these technologies would be also suitable to study N-photon correlations, where high collection efficiency and frequency tunability is desirable. We demonstrated single photon emission of a single quantum dot emitting at 1300 nm, using a Fiber Bragg Grating for wavelength filtering and InGaAs Avalanche Photodiodes operated in Geiger mode for single photon detection. As we do not observe any significant fine structure s…

DYNAMICS0301 basic medicinePhotonOptical fiberRECOMBINATIONPhysics::Optics02 engineering and technologyArticlelaw.invention03 medical and health sciencesOpticsSpontaneous parametric down-conversionFiber Bragg gratinglawTEORIA DE LA SEÑAL Y COMUNICACIONESAstronomical interferometerPhysicsSPECTROSCOPYMultidisciplinarybusiness.industryNew optical fiber based spectroscopicHanbury Brown and Twiss effectCondensed Matter::Mesoscopic Systems and Quantum Hall Effect021001 nanoscience & nanotechnologyInterferometryLIGHT030104 developmental biologyQuantum dot0210 nano-technologybusinessScientific Reports
researchProduct