Second–harmonic generation in poled polymers: pre–poling history paradigm | Zendy

Grzegorz Pawlik | Zendy; Ileana Rău | Zendy; François Kajzar | Zendy; Antoni C. Mituś | Zendy

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

Author(s) -

Grzegorz Pawlik,

Ileana Rău,

François Kajzar,

Antoni C. Mituś

Publication year - 2010

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.18.018793

Subject(s) - poling , second harmonic generation , diagonal , electric field , materials science , dipole , monte carlo method , harmonic , optics , tensor (intrinsic definition) , molecular physics , nonlinear optics , polar , phase (matter) , condensed matter physics , physics , optoelectronics , quantum mechanics , dielectric , ferroelectricity , laser , statistics , geometry , mathematics , pure mathematics

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 nonexponential kinetics of build-up of polar phase responsible for strong/weak SHG susceptibility.

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