Excited state nonlinearity and optical limiting response of cubane-like shaped metal clusters WSe4(MPPh3)(3)Cl (M = Ag, Cu)

Authors
Song, YL Wang, YX Zhang, QF Zhou, F Xin, XQ Ye, HG
Citation
Yl. Song et al., Excited state nonlinearity and optical limiting response of cubane-like shaped metal clusters WSe4(MPPh3)(3)Cl (M = Ag, Cu), MATER LETT, 51(1), 2001, pp. 85-87
Citations number
12
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS LETTERS
ISSN journal
0167577X → ACNP
Volume
51
Issue
1
Year of publication
2001
Pages
85 - 87
Database
ISI
SICI code
0167-577X(200110)51:1<85:ESNAOL>2.0.ZU;2-O
Abstract
The excited state nonlinearity and optical limiting behaviors of cubane-lik e shaped clusters [WSe4(MPPh3)(3)Cl (M = Ag, Cu)] in DMF solution were stud ied by using a picosecond laser pulses. The excited state absorption capabi lity of clusters [WSe4(AgPPh3)(3)Cl] is obviously stronger than that of clu sters [WSe4(CuPPh3)(3)Cl]. Influences of skeletal atoms on excited state ab sorption are significant. The fluence-dependent model was used to describe the optical limiting phenomena, and the ratio of absorption cross-section o f the excited state to that of the ground state of clusters [WSe4(AgPPh3)(3 )Cl] is two times greater than that of fullerene. (C) 2001 Elsevier Science B.V. All rights reserved.