|Statement||O. Szczur ; supervised by R.W. Munn.|
|Contributions||Munn, R. W., Chemistry.|
Second-harmonic generation (SHG) is used to probe the structure and order in monolayer and multilayer Langmuir-Blodgett (LB) films of highly polarizable dye molecules deposited on glass. Ch. Bosshard, G. Decher, B. Tieke, and P. Günter, Linear and nonlinear optical properties of Y-type Langmuir-Blodgett films of 2-docosylaminonitropyridine, in “Nonlinear Optical Materials,” SPIE, ().Author: T. Geisler, S. Rosenkilde, W. M. K. P. Wijekoon, P. N. Prasad, P. S. Ramanujam. Stabilizing Langmuir–Blodgett (LB) films: Laser irradiation accelerates π dimerization of hemicyanine nonlinear optical chromophores in monolayer LB films and causes degradation of their second harmonic generation capability. The metastability of the film is . Mathias Flörsheimer, Munfred Küpfer, Christian Bosshard, Herbert Looser, Peter Günter, Phase‐matched optical second‐harmonic generation in Langmuir–Blodgett film waveguides by mode conversion, Advanced Materials, /adma, 4, 12, (), ().
The behaviour of the materials on the subphase and their resultant Langmuir-Blodgett (LB) film fabrication was studied. The abrupt change in molecular orientation in LB films of the 7-bridged adducts occurring at R= C15H31 and above was not seen in the more flatly orientated a-bridged adducts. Further characterisation of the LB films was. second-harmonic generation, where the monolayer is trans-ferred onto a glass substrate using the Langmuir-Blodgett (LB) technique . Despite these efforts, there still ex-ists a huge need of experimental data in order to better under-stand the alignment properties of these types of compounds. Langmuir-Blodgett films exhibit interesting properties which make them promising materials for application in second order-nonlinear optics. However, there are still some problems to solve. One of these is to maintain the good orientation of chromophores found in monolayers also in noncentrosymmetric multilayer films. Masanao Era "Material design of Langmuir-Blodgett films for second-order nonlinera optics." Asahi Garasu Zaidan Josei Seika Houkoku, , (). in Japanese. Masanao Era, Tetsuo Tsutsui, and Shogo Saito, "Second-order optical nonlinearity in Langmuir-Blodgett films.", Oyo Butsuri, 60, (). in Japanese.
Second Harmonic Generation from Langmuir–Blodgett Films The SHG from the LB films of asymmetrical phthalocyanines was measured in transmission geometry with the use of µ m output from a Nd:YAG model-locked laser; the experimental set-up is shown in Figure The first preparation of non-centrosymmetric Langmuir–Blodgett multilayer films of 2-docosylaminonitropyridine, and the first measurements of optical second-harmonic generation from these films . The preparation and characterisation of novel organo-ruthenium Langmuir-Blodgett films The Langmuir-Blodgett deposition technique enables such assemblies to be constructed by the sequential transfer of organic monomolecular layers from a liquid-air interface onto a solid substrate. optical second-harmonic generation studies have shown. Scheelen A., Winant P., Persoons A. () Second Harmonic Generation from Langmuir Layers and Langmuir-Blodgett Films. In: Messier J., Kajzar F., Prasad P. (eds) Organic Molecules for Nonlinear Optics and Photonics.