Depolarization effect in rare‐earth doped Y 2 O 3 films in blue and UV spectral range

Autor: Anne L. Joudrier, Christian Andriamiadamanana, I. A. Mamedova, Jean Francois Guillemoles, Eldar Mammadov, Sardar Babayev, Naghi Gasimov, Negar Naghavi, Nazim Mamedov
Rok vydání: 2015
Předmět:
Zdroj: physica status solidi c. 12:600-604
ISSN: 1610-1642
1862-6351
DOI: 10.1002/pssc.201400301
Popis: The 200 to 300 nm thick, Er and Er,Yb doped Y2O3 films deposited onto silicon substrate by spin coating have been studied by spectroscopic ellipsometry over the 192-1680 nm spectral range at room temperature. All samples have been found to be strongly depolarizing in the blue and UV part of the spectrum. Complimentary examination of the sample surfaces, using confocal photoluminescence microscopy has disclosed the non-uniform distribution of the rare-earth dopants. The depolarization effects have then been modeled and found to be best reproduced by taking the thickness non-uniformity as the main source of depolarization. The optical constants of the studied films have been determined after four-step modeling with sequential decrease of the mean square error. (© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
Databáze: OpenAIRE
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