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Resonant nonlinear optical studies on porphyrin derivatives

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Title Resonant nonlinear optical studies on porphyrin derivatives
 
Creator KANDASAMY, K
PUNTAMBEKAR, PN
SINGH, BP
SHETTY, SJ
SRIVASTAVA, TS
 
Subject polymer
 
Description The nonlinear optical properties of three porphyrin derivatives (T3,4 BCEMPP, T4 CEMPP and TPP) doped in boric acid glass were probed using the Z-scan technique at different argon-ion laser wavelengths. The nonlinear transmission characteristics of T3,4 BCEMPP and T4 CEMPP exhibit saturable absorption at 457.9 nm and 476.5 nm while these are dominated by excited state absorption at 488.0 nm. However, in the case of TPP, the excited state absorption dominates the nonlinear characteristics except at 457.9 nm. The experimental observations are explained by using the four-level saturable absorber model. Saturation intensity, excited state absorption cross-section, light-induced changes in the absorption and the refractive index along with its sign were determined at these argon-ion laser wavelengths. Furthermore, optical limiting characteristics of these samples were studied. The observed limiting action is consistent with the Z-scan studies.
 
Publisher WORLD SCIENTIFIC PUBL CO PTE LTD
 
Date 2011-09-02T02:03:59Z
2011-12-26T12:59:54Z
2011-12-27T05:53:03Z
2011-09-02T02:03:59Z
2011-12-26T12:59:54Z
2011-12-27T05:53:03Z
1997
 
Type Article
 
Identifier JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS, 6(3), 361-375
0218-1991
http://dx.doi.org/10.1142/S0218863597000277
http://dspace.library.iitb.ac.in/xmlui/handle/10054/12936
http://hdl.handle.net/10054/12936
 
Language en