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Holography in the short-wave infrared range
Schlor, Michal ; Baránek, Michal (referee) ; Bouchal, Petr (advisor)
This master's thesis focuses on digital holography in the near-infrared region. Digital holography is a method that allows for the reconstruction of phase changes and is therefore suitable for studying optical metasurfaces and their properties beyond the capabilities of traditional intensity measurements. The initial research part of the thesis discusses the theory of optical metasurfaces and the principles of digital holography. The acquired knowledge is utilized in the subsequent section of the thesis, which deals with the design of a holographic module that, when connected to a suitable imaging system, enables the implementation of digital holographic microscopy methods. The holographic module is based on a geometric-phase metasurface made of silicon, which allows for operation at a central wavelength of 1550\,nm. The thesis provides a theoretical design of the metasurface and the entire holographic module. The obtained parameters are verified through numerical simulations of holographic imaging. The practical part describes the experimental procedure for testing samples of the geometric-phase metasurface and demonstrates its integration into the assembled holographic module. In the conclusion of the thesis, the holographic module is connected to a microscope and tested under holographic microscopy conditions. The results of the master's thesis can be applicable for investigating phase changes induced by tunable metasurfaces made of vanadium oxide.
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Optical characterization of perovskite via time-resolved spectroscopy
Schlor, Michal ; Kejík, Lukáš (referee) ; Dvořák, Petr (advisor)
This bachelor’s thesis deals with experimental optical characterization of modern organic-anorganic perovskites, which are promised to improve the technology of photovoltaic cells for solar panels soon. Photovoltaic cells based upon these materials bring not only higher efficiency of solar panels, but also relatively simple and cheap manufacture. The first part of this thesis consists of basic structural qualities of perovskites as well as an overview of spectroscopic methods used to examine the properties of perovskites, especially their strong narrow–band photoluminiscence. The second part consists of characterizations of MAPbBr3, FAPbBr3 and MAPbI3 samples based on their photoluminiscence properties.
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Holography in the short-wave infrared range
Schlor, Michal ; Baránek, Michal (referee) ; Bouchal, Petr (advisor)
This master's thesis focuses on digital holography in the near-infrared region. Digital holography is a method that allows for the reconstruction of phase changes and is therefore suitable for studying optical metasurfaces and their properties beyond the capabilities of traditional intensity measurements. The initial research part of the thesis discusses the theory of optical metasurfaces and the principles of digital holography. The acquired knowledge is utilized in the subsequent section of the thesis, which deals with the design of a holographic module that, when connected to a suitable imaging system, enables the implementation of digital holographic microscopy methods. The holographic module is based on a geometric-phase metasurface made of silicon, which allows for operation at a central wavelength of 1550\,nm. The thesis provides a theoretical design of the metasurface and the entire holographic module. The obtained parameters are verified through numerical simulations of holographic imaging. The practical part describes the experimental procedure for testing samples of the geometric-phase metasurface and demonstrates its integration into the assembled holographic module. In the conclusion of the thesis, the holographic module is connected to a microscope and tested under holographic microscopy conditions. The results of the master's thesis can be applicable for investigating phase changes induced by tunable metasurfaces made of vanadium oxide.
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|
|
Optical characterization of perovskite via time-resolved spectroscopy
Schlor, Michal ; Kejík, Lukáš (referee) ; Dvořák, Petr (advisor)
This bachelor’s thesis deals with experimental optical characterization of modern organic-anorganic perovskites, which are promised to improve the technology of photovoltaic cells for solar panels soon. Photovoltaic cells based upon these materials bring not only higher efficiency of solar panels, but also relatively simple and cheap manufacture. The first part of this thesis consists of basic structural qualities of perovskites as well as an overview of spectroscopic methods used to examine the properties of perovskites, especially their strong narrow–band photoluminiscence. The second part consists of characterizations of MAPbBr3, FAPbBr3 and MAPbI3 samples based on their photoluminiscence properties.
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