Large third-order nonlinearity of new ?-conjugated donor-acceptor polymers with substituted thiophene and 1,3,4-oxadiazole moieties
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Date
2012
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Abstract
We present the synthesis of two newly designed, thiophene-based conjugated polymers (P1 and P2) carrying 1,3,4-oxadiazole, 3,4-dinaphthyloxy thiophene, and 3,4-dialkoxy thiophene moieties as potential NLO active materials. Their NLO properties have been investigated both by the Z-scan and degenerate four-wave mixing (DFWM) techniques using 532nm, 7 nanosecond laser pulses. The measured ? and ?(3) values for the polymers are found to be in the range of 1011m/W and 1011esu, respectively. The results indicate that they exhibit good optical-limiting behavior and are promising materials for nonlinear optical applications due to effective two-photon absorption (TPA). © 2012 Copyright Taylor and Francis Group, LLC.
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Keywords
1 , 3 , 4-oxadiazole, 1 ,3 ,4-Oxadiazole moiety, Active material, Degenerate four-wave mixing, Donor-acceptor polymers, Nanosecond laser pulse, NLO properties, Nonlinear optical applications, Oxadiazoles, Substituted thiophene, Third-order non-linearity, Two-photon absorptions, Electrochemical properties, Optical materials, Thiophene, Two photon processes, Conjugated polymers
Citation
International Journal of Polymeric Materials and Polymeric Biomaterials, 2012, 61, 7, pp. 483-504