Share Email Print
cover

Proceedings Paper

Excitation of Er ions by the energy transfer from Si nanocrystals
Author(s): Minoru Fujii; Kei Watanabe; Shinji Hayashi
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Incorporation of Si nanocrystal into Er-doped glasses strongly enhances the IR luminescence of Er3+. The enhancement is believed to be due to the energy transfer from nc-Si. However, the mechanism of the interaction between nc-Si and Er3+ has not been fully understood. In this work, we have studied the interaction between nc-Si and Er3+ by photoluminescence (PL) spectroscopy and PL decay dynamics. In order to tune the luminescence energy of nc-Si to the energy separations between the discrete electronic sates of Er3+, the size of nc-Si was changed in a wide range; the PL energy of nc-Si was changed from 1.2 to 1.5 eV. At low temperatures, periodic features were observed in the PL spectra of nc-Si. The observation of the features is the first spectroscopic evidence that indicates the strong coupling between nc-Si and Er3+. Furthermore, size dependence of the energy transfer rate was estimated from the delay time of the Er3+. The effects of quantum confinement of excitons in nc-Si on the high PL efficiency of Er3+ are discussed.

Paper Details

Date Published: 27 April 2001
PDF: 15 pages
Proc. SPIE 4282, Rare-Earth-Doped Materials and Devices V, (27 April 2001); doi: 10.1117/12.424771
Show Author Affiliations
Minoru Fujii, Kobe Univ. (Japan)
Kei Watanabe, Kobe Univ. (Japan)
Shinji Hayashi, Kobe Univ. (Japan)


Published in SPIE Proceedings Vol. 4282:
Rare-Earth-Doped Materials and Devices V
Shibin Jiang, Editor(s)

© SPIE. Terms of Use
Back to Top