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STUDY OF TIME-RESOLVED REFRACTIVE INDEX IN DYE DOPED POLYMERIC MATERIALS

Gurjit Singh

Department of Physics

51-56

Vol: 4, Issue: 2, 2014

Receiving Date: 2014-02-26 Acceptance Date:

2014-03-27

Publication Date:

2014-04-28

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Abstract

In our study we use DB14/PMMA an organic dye-doped polymer because it has good optical quality and has low glass transition temperature so that it can be easily processed to make large area thin films. Z-scan technique is used for the study of thermal lens effect. The refractive index change is observed due to photo thermal effect. For time constants the experimental values are about 10 times larger than the theoretical values which may be due to the assumption about the air-sample interface. The heat dissipation at the boundary of the sample is not considered. Due to the insulting effect of air it would take more time for the sample to reach thermal equilibrium.

Keywords: DB14/PMMA, Polymer, Refractive index, photo thermal.

References

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  5. S.A. Akhmanov, A.P. Sukhorukov and R.V. Khokhlov, ― Self-focusing and self-trapping of intense light beams in a nonlinear medium,‖ Sov. Phys. JEPT 23, 1025-33(1966).
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