Third order nonlinear optical properties of azomethine derivatives

Thermotropic liquid crystals of azomethine derivatives were synthesized and characterized using various spectroscopic methods. The nonlinear optical properties of these liquid crystals were studied using z-scan technique with 7ns pulse duration at 532nm. The nonlinear refractive index, n2 and the th...

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Bibliographic Details
Published in:Optics communications 2013-01, Vol.287, p.224-227
Main Authors: Rao, D.M., Sharafudeen, K.N., Chandrasekharan, K., Varghese, Soney
Format: Article
Language:English
Subjects:
Azomethine derivatives
Nonlinear absorption
Optical limiting
Schiff's base
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Summary:Thermotropic liquid crystals of azomethine derivatives were synthesized and characterized using various spectroscopic methods. The nonlinear optical properties of these liquid crystals were studied using z-scan technique with 7ns pulse duration at 532nm. The nonlinear refractive index, n2 and the third order nonlinear susceptibility, χ(3) are measured to be of the order of 10−17m2/W and 10−13esu, respectively. Reverse saturable absorption (RSA) was identified as the main mechanism responsible for optical limiting.
ISSN:0030-4018
1873-0310
DOI:10.1016/j.optcom.2012.09.012