@inproceedings{ce950af495314a53b9d3aef02110a995,
title = "Population dynamics of excitons in silicon nanocrystals structures under strong optical excitation",
abstract = "We report on the experimental and theoretical studies of population/depopulation dynamics of excitons in the structures with Si nanocrystals in SiO2 matrix (nc-Si/SiO2) under strong optical excitation. The experimental results are explained using a phenomenological model based on rate equations for coupled system of energy donors (excitons) and energy acceptors (erbium ions). Exciton luminescence is found to exhibit superlinear dependence for Er-doped samples. At the same time the Er-related luminescence at 1.5 µm shows a saturation of the intensity and shortening of the lifetime, which are attributed to the population inversion of the Er ions states. The obtained results demonstrate that nc-Si/SiO2:Er systems can be used for applications in Si-based optical amplifiers and lasers, compatible with planar Si-technology.",
author = "O.A. Shalygina and D.M. Zhigunov and D.A. Palenov and V.Yu Timoshenko and P.K. Kashkarov and M. Zacharias and P.M. Koenraad",
year = "2008",
doi = "10.4028/www.scientific.net/AMR.31.196",
language = "English",
series = "Advanced Materials Research",
pages = "196--198",
booktitle = "International Conference on Materials for Advanced Technologies, ICMAT 2007",
}