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SMV-2023-09: Design and deposition of thin film optical coatings
Pokorný, Pavel ; Oulehla, Jindřich
A study of the possibilities of optical filters production. The optical properties of the filters must comply with those required by the customer. Theoretical calculations are verified by depositing a series of samples by means of electron beam evaporation. In particular, low pass and high pass filters, dichroic mirrors, spectral transmittance correcting filters, antireflective coatings and beam splitters for various angles of incidence will be tested.
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Fabrication and structuring of a thin vanadium dioxide layer for nanophotonics
Spousta, Jiří ; Musálek, Tomáš (referee) ; Rovenská, Katarína (advisor)
Vanadium dioxide is becoming frequently used in tunable metasurfaces, mainly due to its easily achievable insulator to metal phase-transition, occuring at around 67°C. This thesis deals with the optimization of thin VO2 layer fabrication process and specifically with e-beam evaporation and ion beam-assisted sputtering. The phase change of VO2 layers was optically characterized -- mostly, we measured the thermally-dependent transmissivity of our layers. In ion beam-assisted sputtering, we implemented a new process for yielding thin VO2 layers which uses in situ annealing during the deposition. Layers fabricated with this newly implemented process demonstrate a clear phase transition typical for VO2.
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