Abstract

Langmuir-Blodgett (LB) film-forming materials which comprise a hydrophilic head and a hydrophobic tail tend to form centrosymmetric Y-type structures in which the layers pack head-to-head and tail-to-tail, whereas materials with hydrophobic tails at opposite ends of the chromophore form non-centrosymmetric Z-type films in which interlayer packing is head-to-tail. Here, we report the second harmonic generation (SHG) from both the interleaved and the homomolecular LB films.

© 1993 Optical Society of America