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Effects of nitrogen incorporation and thermal annealing on the optical and spin properties of GaPN dilute nitride alloys
Abstract : Here, we report on the structural, optical and magneto-optical properties of as-grown and thermal annealed GaPN thin films containing different N concentrations grown by Solid-Source Molecular Beam Epitaxy on GaP substrates. A wide range of characterization techniques were used to investigate the effect of N incorporation and thermal annealing effect of GaPN/GaP epilayers for a N content between 0.5% and 3%. Our results have shown that as we increase the N content the PL peak energy presents a red shift which is explained by a band gap reduction. However, important effects of exciton localization on optical properties were also evidenced from cw and time resolved PL (PLRT) and magneto-PL. Our results have demonstrated that as the concentration of N is increased, exciton localization effect is enhanced. A substantial improvement of the optical quality and spin properties of the epilayers has been observed after thermal annealing which are significantly more important for samples with higher nitrogen contents.
https://hal-cnrs.archives-ouvertes.fr/hal-02351836
Contributor : Gilles Patriarche Connect in order to contact the contributor
Submitted on : Wednesday, October 13, 2021 - 3:51:12 PM
Last modification on : Monday, April 4, 2022 - 3:24:17 PM
Long-term archiving on: : Friday, January 14, 2022 - 7:26:02 PM
Contributor : Gilles Patriarche Connect in order to contact the contributor
Submitted on : Wednesday, October 13, 2021 - 3:51:12 PM
Last modification on : Monday, April 4, 2022 - 3:24:17 PM
Long-term archiving on: : Friday, January 14, 2022 - 7:26:02 PM
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Balanta et al. - 2020 - Effect...
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Latest author manuscript version including corrigendum (Journal of Alloys and Compounds, Volume 817, 15 March 2020, Pages 152644)
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Distributed under a Creative Commons Attribution - NonCommercial 4.0 International License