With the use of second-harmonic generation, we report the observation of a better alignment of Langmuir–Blodgett-deposited films of 2-docosylamino-5-nitropyradine for a low number of monolayers. An estimation of the nonlinear susceptibility of the molecule is also given. We show that the refractive indices of the Langmuir–Blodgett films has to be taken into account for thicknesses greater than 25 nm.
© 1995 Optical Society of America
Pierre Provencher, Marguerite-Marie Denariez Roberge, Alexandre Suau, Ke Tian, Gaétan Munger, and Roger Leblanc, "Second-harmonic generation investigation of Langmuir–Blodgett 2-docosylamino-5-nitropyradine films," J. Opt. Soc. Am. B 12, 1406-1410 (1995)