Trends in Nonlinear Optical Materials

Dear Colleagues,

Nonlinear optics (NLO) started to be explored by Franken et al., in 1961, with the discovery of second-harmonic generation (SHG) or frequency doubling. That happened right after the construction of the first laser by Maiman in 1960, of which the electric field intensity was sufficient to induce the nonlinear response of matter. Since then, NLO has started finding several applications with a growing impact on today’s daily life in different areas, such as lasers, interaction with materials and information technology. The interest in this field has led to the synthesis of several compounds over the years, both organic molecules and coordination complexes, in order to provide coherent light of different wavelengths, materials interaction through multi-photon absorption (photodynamic therapy in medicine, optical power limiting applications, etc.), advanced spectroscopy and materials analysis, possible applications to communications and sensors, and so on. This Special Issue aims to collect new advances in the synthesis, and experimental and theoretical characterization of new materials, ranging from purely organic derivatives to transition metal and lanthanide complexes, coordination polymers and hybrid systems, and description of their linear and nonlinear optical properties, such as SHG, multi-photon absorption, etc.

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