Title Photoinduced absorption study of carrier dynamics in Ru-doped $Bi_{12}SiO_{20}$ crystals after nanosecond laser pulse excitation Author Marinova, V. Ahmad, I. Goovaerts, E. Faculty/Department Faculty of Sciences. Physics Publication type article Publication 2010 New York, N.Y. :American Institute of Physics , 2010 Subject Physics Source (journal) Journal of applied physics / American Institute of Physics. - New York, N.Y., 1937, currens Volume/pages 107(2010) :11 , p. 7- ISSN 0021-8979 1089-7550 ISI 000278907100007 Carrier E Target language English (eng) Full text (Publishers DOI) Affiliation University of Antwerp Abstract The charge carrier dynamics in the sillenite type crystal Bi12SiO20 (BSO) doped with ruthenium is studied by monitoring the optical density changes after nanosecond laser pulse excitation using a frequency-doubled Nd:yttrium aluminum garnet laser. Ruthenium doping leads to a relatively high density of trap levels that significantly increase the relaxation time of excited charge carriers in comparison with a nondoped BSO. Relaxation dynamics with two different decay time constants is observed in BSO:Ru in the studied submicron to 100 s time range and their dependences on pump intensity and on temperature are investigated. From the observed temperature dependence of the slower and faster of the two decay components, thermal activation energies of Ea,s = 0.80±0.03 eV and Ea,f = 0.68±0.03 eV were determined, respectively. The results indicate that in BSO:Ru at least two different traps centers are involved in the long-lived photoinduced carrier dynamics. E-info http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000278907100007&DestLinkType=RelatedRecords&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000278907100007&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000278907100007&DestLinkType=CitingArticles&DestApp=ALL_WOS&UsrCustomerID=ef845e08c439e550330acc77c7d2d848 Handle