Search results for "Photon recycling"

showing 2 items of 2 documents

Recycled Photons Traveling Several Millimeters in Waveguides Based on CsPbBr 3 Perovskite Nanocrystals

2021

Reabsorption and reemission of photons, or photon recycling (PR) effect, represents an outstanding mechanism to enhance the carrier and photon densities in semiconductor thin films. This work demonstrates the propagation of recycled photons over several mm by integrating a thin film of CsPbBr3 nanocrystals into a planar waveguide. An experimental set-up based on a frequency modulation spectroscopy allows to characterize the PR effect and the determination of the effective decay time of outcoupled photons. A correlation between the observed photoluminescence redshift and the increase of the effective decay time is demonstrated, which grows from 3.5 to near 9 ns in the best device. A stochast…

Materials sciencePhotonMonte-Carlo modelingbusiness.industryPhoton recyclingMonte Carlo methodPhysics::Optics02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesAtomic and Molecular Physics and Optics0104 chemical sciencesElectronic Optical and Magnetic MaterialsCsPbBr3 nanocrystals frequency modulation spectroscopy Monte-Carlo modeling photon recycling waveguidesNanocrystalOptoelectronicsFrequency modulation spectroscopy0210 nano-technologybusinessCsPbBr3Frequency modulation spectroscopyWaveguidesPhoton recyclingPerovskite (structure)Advanced Optical Materials
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Optoelectronic devices based on caesium lead halide perovskite nanocrystals

2020

Tradicionalmente, la implementación de materiales activos en circuitos fotónicos integrados se ha basado en la utilización de semiconductores III-V y vidrios y materiales ferroeléctricos dopados con iones de tierras raras. Sin embargo, en la actualidad existe una alternativa basada en (nano) materiales sintetizados por técnicas de química coloidal. La posibilidad de procesar nanomateriales en solución permite fabricar semiconductores con propiedades ópticas (emisión, absorción, dispersión de luz) que pueden diseñarse durante la síntesis. Además, su naturaleza coloidal permite integrarlas en cualquier arquitectura óptica mediante sencillas técnicas de impresión en tinta. En este contexto, lo…

nanotechnologyperovskite nanocrystalsoptoelectronicsHollow-core fibersUNESCO::FÍSICAIntegrated opticsperovskite materialscharge transportamplified spontaneous emissionlead halide perovskitesphoton recycling:FÍSICA [UNESCO]optical gain
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