Japanese Journal of Applied Physics · 1990 · 31 citations · 5 references
Natural SciencesChemistryMaterials ScienceOptical MaterialsSpectroscopyThin FilmsLipid BilayersNonlinear Optical MaterialsNonlinear OpticsOptical Thin FilmsThin Film Optical PropertiesThin-film MaterialsFilm ThicknessLangmuir-blodgett FilmsMonolayersNonlinear Optical SusceptibilityNonlinear SusceptibilityNonlinear WaveguidesSecond-order Nonlinear SusceptibilityThickness-dependent Optical Properties
Thick noncentrosymmetric LB films of more than 200 bilayers (thickness of more than 1 µm) were successfully fabricated with an alternating deposition of a phenylpyrazine derivative and arachidic acid monolayers. The alternating LB films were transparent from visible to near infrared region. Spectroscopic and X-ray diffraction studies on the alternating LB films proved that molecules were predominantly oriented normal to the film plane in the LB film. Further, the quadratic dependence of second-harmonic (SH) intensity on film thickness was confirmed in the LB films in the wide range of thickness from 1 to 200 bilayers. From the SH generation measurement, the alternating LB films were found to have fairly large second-order nonlinear susceptibility, which was estimated to be 1×10 -7 esu.
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Pyroelectric activity in non-centrosymmetric Langmuir-Blodgett multilayer films
G. W. Smith, Mervyn F. Daniel, J. W. Barton et al. · Thin Solid Films · 1985 · 69 citations · Full text