Rate equation modelling of erbium luminescence dynamics in erbium-doped silicon-rich-silicon-oxide

Content Provider	Semantic Scholar
Author	Shah, Miraj Wojdak, M. B. Kenyon, Anthony J. Halsall, M. P. Li, Hang Crowe, Iain F.
Copyright Year	2012
Abstract	Abstract Erbium doped silicon-rich silica offers broad band and very efficient excitation of erbium photoluminescence (PL) due to a sensitization effect attributed to silicon nanocrystals (Si-nc), which grow during thermal treatment. PL decay lifetime measurements of sensitised Er 3+ ions are usually reported to be stretched or multi exponential, very different to those that are directly excited, which usually show a single exponential decay component. In this paper, we report on SiO 2 thin films doped with Si-nc's and erbium. Time resolved PL measurements reveal two distinct 1.54 μm Er decay components; a fast microsecond component, and a relatively long lifetime component (10 ms). We also study the structural properties of these samples through TEM measurements, and reveal the formation of Er clusters. We propose that these Er clusters are responsible for the fast μs decay component, and we develop rate equation models that reproduce the experimental transient observations, and can explain some of the reported transient behaviour in previously published literature.
Starting Page	3103
Ending Page	3112
Page Count	10
File Format	PDF HTM / HTML
DOI	10.1016/j.jlumin.2012.02.002
Alternate Webpage(s)	http://discovery.ucl.ac.uk/1356436/1/1356436.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.jlumin.2012.02.002
Volume Number	132
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article