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Synthesis and functionalization of coumarin-containing copolymers for second order optical nonlinearities

Abstract :

The second-order nonlinear optical properties of photocross-linkable coumarin-based copolymers were investigated using the optical second harmonic generation (SHG) with the Maker fringes technique. High quality and transparent spin-deposited thin films of various methacrylic copolymers containing 4-methylcoumarin pendant chromophores were prepared and the coumarin units were ordered and oriented by the corona poling technique. Nonlinear optical investigations were performed using a picosecond Q-switched Nd:YAG laser working at the fundamental wavelength (lambda = 1064 nm) and the second order nonlinear optical susceptibilities of the functionalized polymers were determined. The samples were irradiated using two wavelengths (lambda = 254 nm and lambda 300 nm) promoting the reversible photo-induced dimerisation of coumarin moieties within the film. The latter is shown to have a significant impact on the nonlinear optical response of the corresponding material. A large SHG response of photocross-linkable coumarin-based copolymers is obtained.

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https://hal.univ-angers.fr/hal-03344725
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Soumis le : mercredi 15 septembre 2021 - 11:09:20
Dernière modification le : jeudi 9 décembre 2021 - 15:46:06
Archivage à long terme le : : jeudi 16 décembre 2021 - 18:37:13

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Zacaria Essaidi, Oksana Krupka, Konstantinos Iliopoulos, Emilie Champigny, Bouchta Sahraoui, et al.. Synthesis and functionalization of coumarin-containing copolymers for second order optical nonlinearities. Optical Materials, Elsevier, 2013, 35 (3), pp.576-581. ⟨10.1016/j.optmat.2012.10.011⟩. ⟨hal-03344725⟩

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