The semiconductor zinc germanium diphosphide (ZnGeP2) has wide applications in the infrared nonlinear optics (NLO) due to its high nonlinear optical coefficient, wide infrared transparency range and high thermal conductivity.
Conjugated compounds based on vinylthiazole units show a strong polarization along the π chain, when NR2 groups as electron donors are attached in the terminal position. The effect can be even more enhanced by a CHO group as electron acceptor in the opposite terminal position. This property makes such oligomers (n = 1, 2, . . . ) interesting for applications in linear and nonlinear optics.