Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7130038 | Optics & Laser Technology | 2016 | 7 Pages |
Abstract
In this report, we report the intensity dependant nonlinear absorption properties of bio-inspired hybrid materials (betanin-ZnO) embedded in polymeric matrices through the Z-scan technique using an Nd: YAG laser (532Â nm, 7Â ns, 10Â Hz). We observed a change over in the sign of nonlinearity due to the interplay of exciton bleaching and optical limiting mechanisms. Light confinement effect and ship-in-a bottle effect play crucial roles. Theoretical analysis has been performed using a model based on nonlinear absorption coefficient and saturation intensity. The result of present study gives an additional mechanism for the gain enhancement in dye doped ZnO matrix.
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Authors
Aparna Thankappan, V.P.N. Nampoori, Sabu Thomas,