Thesis (M.S.)--Rochester Institute of Technology, 1992. / Typescript. Includes bibliographical references (leaves 59-61).

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The objective of the present dissertation is to advance the science and engineering of metal-dielectric thin-film structures for ultrafast all-optical applications. The research presented consists of three parts: first, the linear and nonlinear optical (NLO) properties of Au and Ag/Au bilayer metallic thin films are comprehensively studied; then the design and properties of a novel nonlinear device structure are presented and finally an ultrafast all-optical shutter is developed and applications are discussed. In the first part, this study describes the linear and NLO properties of bilayer metallic films and shows that they can be tuned by controlling the mass-thickness ratio between Au and Ag. The combined properties of these bilayers are attractive for active plasmonic applications and nonlinear optical filters. Detailed physical models describing the linear and NLO response of Au and Ag/Au bilayers are presented and compared with experiments. In the second part, these models are used to optimize the NLO response of a novel Au-based NLO device. With only four layers, this novel device strongly amplifies the NLO response of the component Au thin film. NLO devices with broad spectral and angular bandwidths in the visible spectral region are demonstrated. The narrow band dependent NLO response of the NLO device is shown to lead to all-optical controls of high peak-power optical signal pulses. Finally, the NLO device technology is integrated into a novel ultrafast all-optical shutter, which allows temporal opening windows (the time shutter remains open) as short as a few ps. Ultrafast all-optical shutter potentially can temporally shape high peak-power nanosecond optical pulses, which could benefit biomedical and micromachining applications. Other possible optical applications such as short electron, X-ray pulse generations, ultrafast photography, and biomedical imaging will also be discussed.

L'objectif de cette thèse est de fabriquer différents dispositifs optiques basés sur la structuration des cristaux liquides. Nous avons tout d'abord présenté différentes méthodes pour aligner les molécules de cristaux liquides et détaillé celles que nous avons utilisées au cours de ce travail. L'alignement et certaines propriétés physiques des cristaux liquides ont permis de fabriquer des dispositifs optiques. Ces dispositifs se divisent généralement en trois catégories : les filtres optiques, les modulateurs spatiaux et les guides d'ondes optiques. Ils sont présents dans divers secteurs et particulièrement dans le domaine des télécommunications. La structure des cristaux liquides cholestériques a une biréfringence périodique qui donne lieu à une réflexion sélective de la polarisation circulaire de la lumière. Nous avons tiré profit de cette propriété en fabricant un miroir de Bragg commutable. Ce miroir nous a permis de fabriquer un filtre de Fabry-Pérot commutable et accordable. Un réseau de polymère a été utilisé pour stabiliser le cristal liquide cholestérique, afin d'apporter résistance mécanique et durabilité aux champs électriques. Les cristaux liquides ferroélectriques présentent des propriétés électro-optiques efficaces, en particulier un temps de réponse élevé. Cette propriété a été exploitée pour fabriquer des obturateurs optiques pour lunettes 3D actives basées sur des cristaux liquides ferroélectriques. Malgré un temps de réponse élevé, les cristaux liquides ferroélectriques présentent certains défauts structurels. Nous avons proposé une nouvelle technique pour pallier ces défauts. Enfin, nous avons fabriqué des guides d'ondes gravés dans le polymère à cristaux liquides. Nous avons fabriqué ce polymère à cristaux liquides de manière à obtenir deux phases de cristal liquide différentes : isotrope et anisotrope, sur le même substrat. Le substrat a ensuite été gravé afin de créer un séparateur de polarisation séparant le mode TE et TM dans les deux branches du guide.

The topic of this master’s thesis was to make an architectural study of the Childern´s sanatorium with speleotheraphy in Ostrov u Macochy. The Sanatorium provides a professional care to the children and teenage with respiratory diseases, asthma but also skin diseases. The proposed building will primarily serve the needs of this sanatorium with the possibility of using some of its parts by the public. The area is located near the upper entrance to the Císařská jeskyně, which is now used for speleotherapy. The new building will be located on a sloping terrain near the surrounding development, which consists only of family houses. The ambition of the proposal was to use the orientation of the slope to the south, which offers a beautiful view of the town and at the same time sensitively set the building into the surrounding landscape of the Moravian Karst. The project itself consists of 4 main buildings that are interconnected by atrium in the middle. This atrium connects not only buildings, but also individual services, and thus acts as a kind of communication node.

Master’s thesis addresses the design and implementation documentation of the three storey bus station in the Czech Krumlov Street Hospital . From this street is also suggested links to the transport infrastructure of the entire plot of land at 497/1 . Object Bus Station is located on the western part of the site . The main entrance is oriented to the southeast side of the building. The main hall on the first floor is primarily used for passengers. There is a waiting room , treasury , information and Internet room. Further, the circuit layout is 7 retail space with a pharmacy for dispensing drugs. The left wing spaces are public toilets and sanitary facilities for employees. There is also a buffet with 30 seats . The second floor space small cafe with a terrace where you can view the historical part of the city . Furthermore, the time of day or a rest room for drivers and office spaces with sanitary facilities . On the third floor are offices spaces again and archives there is also a ventilation machine room and a sprinkler system.