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Tesi etd-11182016-172535


Tipo di tesi
Tesi di dottorato di ricerca
Autore
VOLPI, AZZURRA
URN
etd-11182016-172535
Titolo
Cooling effect on fluoride crystals
Settore scientifico disciplinare
FIS/03
Corso di studi
FISICA
Relatori
tutor Prof. Tonelli, Mauro
commissario Chiofalo, Maria Luisa
commissario Prof. Seletskiy, Denis
commissario Prof. Bettinelli, Marco
Parole chiave
  • cooling
  • crystal
  • fluorides
  • growth
  • laser
  • Yb-doped
Data inizio appello
20/12/2016
Consultabilità
Non consultabile
Data di rilascio
20/12/2019
Riassunto
In this work various Yb-doped fluoride single crystals have been investigated as active media for optical refrigeration. For each material, samples with varying doping levels have been grown by means of the Czochralski technique, optically charaterized through absorption, static and dynamic fluorescence measurements and tested for anti-Stokes cooling. The optical cooling efficiency has been measured by measuring the heating/cooling temperature change of samples as a function of pumping wavelength. A preliminary investigation of impurities by elemental analyses has been also carried out.
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