NDLI: Optical Kerr effect in nematic doped with azo-benzene functionalized POSS nanoparticles

Content Provider	IEEE Xplore Digital Library
Author	Miniewicz, A. Mossety-Leszczak, B. Girones, J. Karpinski, P. Galina, H. Dutkiewicz, M.
Copyright Year	2013
Description	Author affiliation: Fac. of Chem., Rzeszow Univ. of Technol., Rzeszow, Poland (Mossety-Leszczak, B.; Galina, H.) \|\| Dept. of Chem., Wroclaw Univ. of Technol., Wroclaw, Poland (Miniewicz, A.; Girones, J.; Karpinski, P.) \|\| Fac. of Chem., Adam Mickiewicz Univ. of Poznan, Poznan, Poland (Dutkiewicz, M.)
Abstract	In this work, two novel azo-benzene substituted polyhedral oligomeric silsesquioxanes (POSS) compounds having m =4 and m = 10 in order to check their nonlinear optical properties when dissolved in common nematic mixture E-7 were synthesized. The method of optically induced birefringence of LC or so called Optical Kerr Effect (OKE) was used. The light-induced birefringence in nematic liquid crystals can be treated as a third order nonlinear optical effect because of changes of refractive index of the form: n = $n_{o}$ + $n_{2}I$ where nonlinear optical coefficient $n_{2}$ is proportional to the cubic optical susceptibility. Excitation within absorption n-π* band of azo-group was able to induce a cycle of trans-cis photoisomerisations leading to inducement of rearrangement of nematic molecules forming a layer in a homogenic LC cell. The results of this work prove that nematic LC doped with POSS based azo-functionalized nanoparticles is a reliable system for dynamic all-optical switching as well as can found application in a real-time holography.
Sponsorship	Eur. Phys. Soc.
Starting Page	1
Ending Page	1
File Size	163502
Page Count	1
File Format	PDF
e-ISBN	9781479905942
DOI	10.1109/CLEOE-IQEC.2013.6801807
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-05-12
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Optical polarization Chemistry Optical variables control Educational institutions Silicon Optical refraction Nonlinear optics
Content Type	Text
Resource Type	Article

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