NDLI: Búsqueda y caracterización de nuevos materiales y su aplicación en recubrimientos ópticos para el ultravioleta lejano y extremo

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Búsqueda y caracterización de nuevos materiales y su aplicación en recubrimientos ópticos para el ultravioleta lejano y extremo

Content Provider	Semantic Scholar
Author	Perea, Mónica Fernández
Copyright Year	2011
Abstract	El intervalo espectral conocido como ultravioleta lejano y extremo (FUV/EUV), que comprende longitudes de onda entre 10 y 200 nm, ha permanecido practicamente inexplorado debido a la gran absorcion que presentan los materiales. Sin embargo, en la actualidad existe una gran motivacion por parte de la comunidad cientifica para el desarrollo de instrumentacion en este intervalo espectral, cuya eficiencia depende en gran medida de la de los recubrimientos opticos. El conocimiento preciso de las constantes opticas de los materiales en lamina delgada es fundamental para que el diseno de los recubrimientos opticos se pueda realizar adecuadamente. En el FUV/EUV existen muchos materiales que no han sido aun caracterizados, mientras que otros lo han sido en condiciones inapropiadas. Por lo tanto uno de los objetivos de este trabajo fue la busqueda y caracterizacion optica de materiales adecuados para su uso en recubrimientos opticos para el FUV/EUV. Los materiales caracterizados fueron SiC, Sc, Yb, Ce, B y SiO. Los resultados obtenidos han confirmado la idoneidad de estos materiales como constituyentes de recubrimientos opticos en el FUV/EUV. El otro objetivo de esta tesis doctoral fue el diseno, preparacion y caracterizacion de recubrimientos opticos para la region del FUV/EUV con longitudes de onda comprendidas entre 50 y 200 nm. Estos recubrimientos contienen materiales que fueron estudiados previamente en el Grupo de Optica de Laminas Delgadas, asi como algunos de los materiales que se han caracterizado en el contexto de esta tesis doctoral. Se han preparado espejos de banda ancha (bicapas de Al y MgF2 y multicapas de Al, MgF2 y SiC), y filtros que funcionan por transmision (multicapas de Al y MgF2) y por reflexion (multicapas de Al, Yb y SiO). Por ultimo, se han aportado nuevos datos acerca del envejecimiento y las posibles vias para mejorar la eficiencia de estos recubrimientos. [ABSTRAT]: The spectral range known as far and extreme ultraviolet (FUV/EUV), comprising wavelengths from 10 to 200 nm, has remained almost unexplored due to the high absorption displayed by materials. However, a great motivation from the scientific community has recently arisen to develop instrumentation for the FUV/EUV. The efficiency of this instrumentation depends strongly on the efficiency of optical coatings. A precise knowledge of the optical constants of thin film materials is fundamental to properly design optical coatings. In the FUV/EUV there are many materials that have not been studied yet, while some others were not characterized in appropriate conditions. Therefore, one of the objectives of this work was the search of new materials suitable to be used in optical coatings for the FUV/EUV. The characterized materials were SiC, Sc, Yb, Ce, B and SiO. The obtained results have confirmed that these materials are adequate as constituents of FUV/EUV optical coatings. Another objective of this work was the design, preparation and characterization of optical coatings for the spectral range with wavelengths going from 50 to 200 nm. These coatings include layers of materials that were studied previously by the Grupo de Optica de Laminas Delgadas, and also some of the materials that were characterized during this thesis. Broad band mirrors (Al and MgF2 bilayers and Al, MgF2 and SiC multilayers) and filters working by transmission (Al and MgF2 multilayers) and by reflection (Al, Yb and SiO multilayers) were prepared. Finally, new data regarding the ageing of the coatings and the possible ways to improve their performance were provided.
File Format	PDF HTM / HTML
Alternate Webpage(s)	https://eprints.ucm.es/8085/1/T30507.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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