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Second-harmonic generation in poled polymers: pre-poling history paradigm

Abstract :

Experimental studies of second harmonic generation (SHG) from electric-field poled PMMA - DR1 system show occurrence of a maximum in diagonal and off diagonal tensor components χ(2)(−2ω; ω, ω) at 15 mol % concentration and a rapid decrease above, with a stabilization. The origin of the observed concentration dependence is studied using the Monte Carlo (MC) modeling. We find that presence of maximum is conditioned by the pre-poling history of the sample, when entanglement of linear dipolar structures takes place. Length of the pre-poling interval is an important kinetic parameter which differentiates between various non-exponential kinetics of build-up of polar phase responsible for strong/weak SHG susceptibility.

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https://hal.univ-angers.fr/hal-03343392
Contributeur : Okina Université d'Angers <>
Soumis le : mardi 14 septembre 2021 - 10:33:21
Dernière modification le : mercredi 15 septembre 2021 - 03:27:14

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G. Pawlik, Ileana Rau, François Kajzar, Antoni Mitus. Second-harmonic generation in poled polymers: pre-poling history paradigm. Optics Express, 2010, 18 (18), pp.18793 - 18804. ⟨10.1364/OE.18.018793⟩. ⟨hal-03343392⟩

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