{"id":33446,"date":"1997-09-12T00:00:00","date_gmt":"1997-09-12T00:00:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/nuevos-metodos-de-caracterizacion-optica-de-semiconductores-basados-en-medidas-espectroscopicas-de-reflexion\/"},"modified":"1997-09-12T00:00:00","modified_gmt":"1997-09-12T00:00:00","slug":"nuevos-metodos-de-caracterizacion-optica-de-semiconductores-basados-en-medidas-espectroscopicas-de-reflexion","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/nuevos-metodos-de-caracterizacion-optica-de-semiconductores-basados-en-medidas-espectroscopicas-de-reflexion\/","title":{"rendered":"Nuevos metodos de caracterizacion optica de semiconductores basados en medidas espectroscopicas de reflexion."},"content":{"rendered":"<h2>Tesis doctoral de <strong> Juan  Jos\u00e9 Ruiz P\u00e9rez <\/strong><\/h2>\n<p>La tesis doctoral que se presenta, introduce un conjunto de m\u00e9todos originales para la caracterizaci\u00f3n \u00f3ptica de l\u00e1minas delgadas de semiconductores, depositados sobre un substrato de vidrio grueso y transparante.  estos m\u00e9todos permiten obtener las partes real e imaginaria del \u00edndice de refracci\u00f3n complejo, el coeficiente de absorci\u00f3n, el espesor de la pel\u00edcula y el gap \u00f3ptico del material analizado. Se estudia, tambi\u00e9n, el efecto producido en los espectros por la falta de uniformidad de la l\u00e1mina de semiconductor. Se propone un modelo geom\u00e9trico con un gradiente de espesor constante que se aplica con \u00e9xito sobre pel\u00edculas reales de distintas composiciones.  se presentan expresiones nuevas para la reflectancia y transmitancia que responden al modelo geom\u00e9trico anterior. Asimismo, se han derivado, tambi\u00e9n, nuevas expresiones para las envolventes superior e inferior de los espectros de te\u00f3ricos de reflexi\u00f3n y de transmisi\u00f3n.  se presenta la justificaci\u00f3n te\u00f3rica de un nuevo fen\u00f3meno f\u00edsico que puede aparecer bajo unas condiciones geom\u00e9tricas muy espec\u00edficas; se le ha denominado inversi\u00f3n de envolventes. Se ha comprobado experimentalmente la aparici\u00f3n de este fen\u00f3meno sobre muestras de la composici\u00f3n calcogenura v\u00edtrea as25s75. Se presenta una generalizaci\u00f3n de las expresiones anal\u00edticas para la reflexi\u00f3n, transmisi\u00f3n y envolventes superior e inferior de ambas que incluyen el efecto de este fen\u00f3meno.  tambi\u00e9n se introduce una nueva expresi\u00f3n anal\u00edtica que relaciona las envolventes respectivas de espectros de reflexi\u00f3n de pel\u00edculas de espesor uniforme con los correspondientes a pel\u00edculas de espesor variable, y otra expresi\u00f3n para la envolvente de compresi\u00f3n m\u00e1xima. Todas estas expresiones anteriores se han aplicado en los m\u00e9todos propuestos sobre pel\u00edculas de distintas composiciones, obteni\u00e9ndose las constantes \u00f3pticas del material analizado y unas cotas de los errores cometidos.<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Nuevos metodos de caracterizacion optica de semiconductores basados en medidas espectroscopicas de reflexion.<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Nuevos metodos de caracterizacion optica de semiconductores basados en medidas espectroscopicas de reflexion. <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Juan  Jos\u00e9 Ruiz P\u00e9rez <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 C\u00e1diz<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 09\/12\/1997<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Emilio Jos\u00e9 M\u00e1rquez Navarro<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: rafael Jimenez garay <\/li>\n<li>alejandro Conde amiano (vocal)<\/li>\n<li>roca Bol\u00f3ix  Carlos (vocal)<\/li>\n<li>m. teresa Montojo supervielle (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Juan Jos\u00e9 Ruiz P\u00e9rez La tesis doctoral que se presenta, introduce un conjunto de m\u00e9todos originales para [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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