PHOTOLUMINESCENT SPECTRUM AND DYNAMICS OF SI-ION-IMPLANTED AND THERMALLY ANNEALED SIO2 GLASSES()

Citation
Y. Kanemitsu et al., PHOTOLUMINESCENT SPECTRUM AND DYNAMICS OF SI-ION-IMPLANTED AND THERMALLY ANNEALED SIO2 GLASSES(), Physical review. B, Condensed matter, 54(20), 1996, pp. 14329-14332
Citations number
28
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
01631829
Volume
54
Issue
20
Year of publication
1996
Pages
14329 - 14332
Database
ISI
SICI code
0163-1829(1996)54:20<14329:PSADOS>2.0.ZU;2-V
Abstract
We have experimentally studied the photoluminescent (PL) properties of Si clusters in fused silica matrices. Si clusters in the SiO2 matrice s were fabricated by Si+-ion implantation (200 keV, 2x10(17) cm(-2)) i nto silica and then thermally annealed in forming gas. A broad PL peak is observed in the visible spectral region at room temperature. The t emperature dependence of the luminescent spectrum and the PL decay dyn amics are controlled by nonradiative recombination processes due to ph onon-assisted tunneling between localized radiative and nonradiative c enters. Resonantly excited PL spectra indicate that the strong couplin g of excitons and stretching vibrations of the Si-O bonds cause fine s tructures in the luminescent spectra. It is concluded that the interac tion between electronic and vibrational excitations control the lumine scent emission and the observed dynamics.