Wavelength dependent studies of nonlinear absorption in zinc meso-tetra(p-methoxyphenyl)tetrabenzoporphyrin (Znmp TBP) using Z-scan technique
✍ Scribed by N. K. M. Naga Srinivas; S. Venugopal Rao; D. V. G. L. N. Rao; B. K. Kimball; M. Nakashima; B. S. DeCristofano; D. Narayana Rao
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 127 KB
- Volume
- 05
- Category
- Article
- ISSN
- 1088-4246
- DOI
- 10.1002/jpp.357
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✦ Synopsis
We report here, our experimental results and theoretical analysis of the dispersion data of nonlinear absorption in zinc meso-tetra-(p-methoxyphenyl)tetrabenzoporphyrin (ZnmpTBP). Using a ns optical parametric oscillator (OPO) we obtain the open aperture Z-scan data over the visible region starting from 480 nm to 600 nm. We use a more general five-level model for evaluating the excited state parameters like excited state absorption coefficients, two-photon absorption coefficient, etc. Due to its large excited state absorption cross-sections this material acts as a very good candidate for a broadband optical limiter in the visible region.