Optical loss in Langmuir-Blodgett multi-layers of 22-tricosenoic acid

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Abstract
The authors present results on how the optical properties of Langmuir-Blodgett (LB) films vary with wavelength. Multi-layers of the LB material 22-tricosenoic acid were formed into waveguides, thus allowing determinations of their dielectric tensor and thickness. They have been able to separate out bulk and surface terms from the attenuation of the various guided modes and thus obtain information on the surface roughness of the LB films concerned. Further, they have shown that films made on aluminium substrates show considerably less loss than those on silver.