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Modelling electron energy-loss spectra of vanadium dioxide nanostructures
Kabát, Jiří ; Křápek, Vlastimil (referee) ; Konečná, Andrea (advisor)
This thesis concerns the characterization of optical modes in vanadium dioxide (VO2) nanostructures, mainly by simulating numerically electron energy loss spectroscopy (EELS) intensity. Among the studied optical modes, there are plasmons, phonons and Mie-type resonances, for which we performed a literature review. VO2 undergoes a phase transition when reaching a temperature of about 67 °C from the insulating phase to the metallic phase. This phase transition is connected to significant changes in optical properties, which offer potential uses in nanophotonics. The main part of the thesis is devoted to numerical simulations, which were firstly performed for thin VO2 slabs and then for VO2 nanoparticles. In simulations of VO2 nanoparticles in the metallic phase, we observed electron energy losses caused by plasmons and localized surface plasmons, which were then characterized and imaged by spacedependent EELS maps. In nanoparticles in the insulating phase, losses caused by phonon excitations and material absorption were observed. A new kind of loss contribution was observed for some geometries, potentially related to the Mie-type resonances.
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Modelling electron energy-loss spectra of vanadium dioxide nanostructures
Kabát, Jiří ; Křápek, Vlastimil (referee) ; Konečná, Andrea (advisor)
This thesis concerns the characterization of optical modes in vanadium dioxide (VO2) nanostructures, mainly by simulating numerically electron energy loss spectroscopy (EELS) intensity. Among the studied optical modes, there are plasmons, phonons and Mie-type resonances, for which we performed a literature review. VO2 undergoes a phase transition when reaching a temperature of about 67 °C from the insulating phase to the metallic phase. This phase transition is connected to significant changes in optical properties, which offer potential uses in nanophotonics. The main part of the thesis is devoted to numerical simulations, which were firstly performed for thin VO2 slabs and then for VO2 nanoparticles. In simulations of VO2 nanoparticles in the metallic phase, we observed electron energy losses caused by plasmons and localized surface plasmons, which were then characterized and imaged by spacedependent EELS maps. In nanoparticles in the insulating phase, losses caused by phonon excitations and material absorption were observed. A new kind of loss contribution was observed for some geometries, potentially related to the Mie-type resonances.
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Covert personal goods in labour relation
Kabát, Jiří ; Vysokajová, Margerita (referee) ; Štefko, Martin (referee)
Rigorous work occupy by farms protection in personal and labour law relations. Rigorous work is divided on two part. First part deal with characteristic and development adjustment of law as concern personal protection. Next , in this introducing part devote adjustment of personal protection including institutional and civil delimitation. Second part deal with farms protection in personal and labour law relations. At rigious work lay contains above all protection employees privacy mainly in relation to technological development and protection employees law of property. No forgotten life and healthy law protection in working law relation. Itś also mentioned civic honour and dignity protection , name and personal nature. No skip problems of subject to the statue of compensation limitations no property money detriment and usability illegal proof in civic court process. In rigious work is indicate legal adjustment contained in new civic code of law. Rigious work ending by devote protection of personal date, well treatment and ban discrimination in legal working relations.
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Covert personal goods in labour relation
Kabát, Jiří ; Vysokajová, Margerita (referee) ; Štefko, Martin (referee)
Rigorous work occupy by farms protection in personal and labour law relations. Rigorous work is divided on two part. First part deal with characteristic and development adjustment of law as concern personal protection. Next , in this introducing part devote adjustment of personal protection including institutional and civil delimitation. Second part deal with farms protection in personal and labour law relations. At rigious work lay contains above all protection employees privacy mainly in relation to technological development and protection employees law of property. No forgotten life and healthy law protection in working law relation. Itś also mentioned civic honour and dignity protection , name and personal nature. No skip problems of subject to the statue of compensation limitations no property money detriment and usability illegal proof in civic court process. In rigious work is indicate legal adjustment contained in new civic code of law. Rigious work ending by devote protection of personal date, well treatment and ban discrimination in legal working relations.
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