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Appl. Sci. 2012, 2(4), 682-708; doi:10.3390/app2040682

Fluorinated and Non-Fluorinated Electro-Optic Copolymers: Determination of the Time and Temperature Stability of the Induced Electro-Optic Coefficient

Dipartimento di Scienze di Base ed Applicate per l’Ingegneria, Sapienza Università di Roma and CNISM/Via A. Scarpa 14, I-00161 Roma, Italy
Received: 12 September 2012 / Revised: 28 September 2012 / Accepted: 28 September 2012 / Published: 9 October 2012
(This article belongs to the Special Issue Feature Papers)
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Abstract

Organic fluorinated materials demonstrate their excellent electro-optic properties and versatility for technological applications. The partial substitution of hydrogen with fluorine in carbon-halides bounds allows the reduction of absorption losses at the telecommunication wavelengths. In these interesting compounds, the electro-optic coefficient was typically induced by a poling procedure. The magnitude and the time stability of the coefficient is an important issue to be investigated in order to compare copolymer species. Here, a review of different measurement techniques (such as nonlinear ellipsometry, second harmonic generation, temperature scanning and isothermal relaxation) was shown and applied to a variety of fluorinated and non-fluorinated electro-optic compounds.
Keywords: electro-optic polymers; fluorinated polymers; electro-optic time stability electro-optic polymers; fluorinated polymers; electro-optic time stability
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Belardini, A. Fluorinated and Non-Fluorinated Electro-Optic Copolymers: Determination of the Time and Temperature Stability of the Induced Electro-Optic Coefficient. Appl. Sci. 2012, 2, 682-708.

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