Author details

The experimental second harmonic generation of MAPLE-grown 1,2,3,4,5,6,7,8-

The SHG experimental spectra of MAPLE-grown OHA thin films (adapted with the permission from reference

40,000 pulses, on Si substrates, under fs-laser irradiation at 788 nm wavelength is represented in Figure 15 [114]. In this case, the presence of the SHG signal is related

The synthesis of the most important classes of the nonlinear optical organic compounds, fullerenes, perylenes, thiophene, azo-dyes dyes, thienes, polymers, and other compounds, along with the techniques employed for the deposition of these compounds, was presented. For the synthesis of the new compounds with nonlinear optical applications, important reactions, like Stille, Suzuki, Knoevenagel,

Among the simpler and more sophisticated techniques, the matrix-assisted pulsed laser evaporation (MAPLE) technique that permits making organic films with different morphologies, on different types of substrates, is the main method used to obtain thin laser films, with three basic advantages: the control of thickness; possibility to deposit multilayers; and fabrication of thin films on nonplanar substrates with good surface coverage. Crystallization growth mechanisms in MAPLEdeposited conjugated polymer films that determine specific structure, therefore the carrier transport properties, were discussed in relation with second harmonic

Organic compounds are cheap, low toxicity, ease of solution processability;

, laser spot 2 mm<sup>2</sup>

, and

octahydroacridine (OHA) 47 using laser fluence 0.3 J/cm<sup>2</sup>

to the conformational asymmetry of the OHA molecule.

Huisgen, Vilsmeier-Haack-Arnold, click, were employed.

therefore, their applications as NLO materials are growing.

The author has no conflict of interest to declare.

generation (SHG) behavior of the thin films.

Conflict of interest

14

5. Conclusions

Figure 15.

Applied Surface Science

[114]).

Maria Marinescu Faculty of Chemistry, University of Bucharest, Bucharest, Romania

\*Address all correspondence to: maria7marinescu@yahoo.com

© 2018 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
