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TDX (Tesis Doctorals en Xarxa)
Doctoral thesis . 2022
License: CC BY NC SA
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Recolector de Ciencia Abierta, RECOLECTA
Doctoral thesis . 2010
License: CC BY NC SA
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Recolector de Ciencia Abierta, RECOLECTA
Doctoral thesis . 2022
License: CC BY NC SA
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Mueller matrix polarimetry of anisotropic chiral media

Authors: Arteaga Barriel, Oriol;

Mueller matrix polarimetry of anisotropic chiral media

Abstract

[eng] Esta tesis se centra en el estudio de medios quirales mediante polarimetría de matriz de Mueller. Ópticamente los medios quirales se caracterizan por tener actividad óptica, que se manifiesta en procesos dispersivos con la birefringencia circular o en procesos de absorción mediante el cicroismo circular. Nuestro ámbito de estudio han estado los anisótropos no es posible aplicar los métodos convencionales de determinación de la actividad óptica ya que la descripción de la propagación de la luz polarizada se vuelve mucho más compleja ya que el dicroismo y la birefringencia lineales también están presentes. Una parte importante del trabajo han sido el desarrollo teórico necesario para poder obtener los parámetros de dicroismo circular o birefringencia circular a partir de las medidas de la Matriz de Mueller de una muestra anisótropa arbitraria. Otra parte importante del trabajo ha sido la y construcción de un polarímetro de matriz de Mueller de alta resolución basado en el uso de dos moduladores fotoelásticos y es capaz de trabajar en dos modos de funcionamiento: espectroscópico y con resolución espacial. Los desarrollos instrumentales teórico nos han llevado a poder realizar caracterizar muestras de diversa índole. En el ámbito cristalográfico hemos medido espectroscópicamente el tensor de girotropía del cuarzo y hemos mostrado la posibilidad de distinguir dominios quirales en capas delgadas policristalinas. Otro apartado experimental fundamental ha sido la caracterización de procesos de inducción de quiralidad supramolecular mediante efectos hidrodinámicos en soluciones agitadas de nanopartículas orgánicas de formas alargadas.

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Spain
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Keywords

53, Ellipsometry, Polarització (Llum), Anisotropia, Anisotropía, Ciències Experimentals i Matemàtiques, Meteorits, Polarización (Luz), Quiralidad, Meteoritos, Quiralitat, Anisotropy, Chirality, Polarization (Light), Elipsometría, El·lipsometria, Meteorites

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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