Publications

Authors:

M., Mattarelli; M., Montagna; F., Rossi; C., Tosello; N. D., Afify; Bettinelli, Marco Giovanni; Speghini, Adolfo; C., Armellini; Y., Jestin; F., Rocca; S., Gialanella

Title:

Raman and Er3+ spectroscopy of hafnia single crystals and nanocrystals

Year:

2009

Type of item:

Articolo in Rivista

Tipologia ANVUR:

Articolo su rivista

Language:

Inglese

Referee:

Sì

Name of journal:

Optical Materials

ISSN of journal:

0925-3467

N° Volume:

31

Number or Folder:

9

Page numbers:

1362-1365

Keyword:

Glass–ceramic; Erbium spectroscopy; Hafnia crystals

Short description of contents:

In this work, we report on the spectroscopic characterization of erbium doped HfO2 nanocrystals in SiO2-HfO2 glass-ceramic waveguides, fabricated by sol-gel process. The results are compared with those of single crystals grown using the flux growth technique. XRD and Raman measurements showed that the single crystals are monoclinic, while in the glass-ceramic waveguides, depending on the heat treatment, the nanocrystals are present in both tetragonal and monoclinic phases. The size distribution of nucleated nanocrystals was studied by transmission electron microscopy. The Raman peaks of the nanocrystals are broadened and shifted with respect to those observed in the bulk samples. The luminescence measurements in monoclinic nanocrystals and bulk single crystals of the same structure are quite dissimilar, evidencing that the rare earth ions are subjected to a different crystal field.

Product ID:

56187

Handle IRIS:

11562/337263

Deposited On:

May 12, 2010

Last Modified:

November 3, 2022

Bibliographic citation:

M., Mattarelli; M., Montagna; F., Rossi; C., Tosello; N. D., Afify; Bettinelli, Marco Giovanni; Speghini, Adolfo; C., Armellini; Y., Jestin; F., Rocca; S., Gialanella, Raman and Er3+ spectroscopy of hafnia single crystals and nanocrystals «Optical Materials» , vol. 31 , n. 9 , 2009 , pp. 1362-1365

Consulta la scheda completa presente nel repository istituzionale della Ricerca di Ateneo