Abstract

Organic molecules often present, at given wavelengths, reverse saturable absorption behavior:^1–5 at low fluences, the absorption is weak; at high fluences, some molecules are excited to the first excited state whose absorption is greater. Aluminophthalocyanines encaged in solid inorganic xerogel silica matrices obtained from tetraethoxysilane precursors present this behavior.⁵ Similar results are also obtained with mixed organic/inorganic doped matrices.

© 1994 IEEE