Optical second harmonic generation (SHG) is used as a noninvasive probe of two-dimensional (2D) ferroelectricity in Langmuir-Blodgett (LB) films of copolymer vinylidene fluoride with trifluorethylene. The surface 2D ferroelectric-paraelectric phase transition in the topmost layer of LB films and a thickness independent (almost 2D) transition in the bulk of these films are observed in temperature studies of SHG.
@article{arxiv.physics/9909010,
title = {Optical second harmonic generation probe of two-dimensional ferroelectricity},
author = {O. A. Aktsipetrov and T. V. Misuryaev and T. V. Murzina and L. M. Blinov and V. M. Fridkin and S. P. Palto},
journal= {arXiv preprint arXiv:physics/9909010},
year = {2009}
}