Doktorantūra

Atgal

Theoretical modelling of multilayer sculptured coatings optical and structural properties

The methodology of sculptured thin films and glancing angle deposition (GLAD) has been studied for decades. Over the last three years, the use of the GLAD technology for multilayer coatings with different high and low refractive index materials has been demonstrated. This has opened up new opportunities for optical components that are used in high power laser systems. Sculptured thin films are also used to form unique optical coatings: zero-angle polarizers, phase plates, and so on. Unfortunately, there is a lack of theoretical simulations of such coatings that would allow to explain experimental data and measurement results. Analytical and digital calculations would optimize the electrical field distribution in the coatings and further increase their optical resistance. No less important is the optimization of the design of multilayer sculptured coatings, which is currently not available.

Work will be carried out at the Optical Coatings Laboratory, FTMC. It is equipped with five thin film forming devices (two sputtering units, two evaporation and one atomic layer deposition), two of which are equipped with glancing angle deposition methodology. The laboratory also has advanced measuring and analysis equipment: spectrometer, atomic force microscope, laser set-up for measuring optical resistivity and so on. The existing software allows you to model only standard dense isotropic coatings, so the use of additional software packages will be needed during doctoral studies.

Each of these devices has been used in research for several years. Evaporation angle technology has been developed in the laboratory for about eight years. Seven articles on this topic were published during this period. The laboratory also carries out various types of project activities for researching and analyzing sculptural coatings. During the doctoral studies, the student would model the multilayer sculptured coatings and compare the results with the experimental data.
 
For more information, please contact the theme supervisor T. Tolenis.