"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

RAMAN SPECTRA OF AsxSe100-x GLASSES DOPED WITH METALS

M. S. Iovu1,* , E. I. Kamitsos2, C. P. E. Varsamis2, P. Boolchand3, M. Popescu4

Affiliation

  1. Center of Optoelectronics, IAP, ASM, Str. Academiei 1, MD-2028 Chisinau, R. Moldova
  2. Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vass. Constantinou Ave., 11635 Athens, Greece
  3. University of Cincinnati, Cincinnati, Ohio 45221-0030, USA
  4. National Institute for Physics of Materials, Bucharest-Magurele, Romania

Abstract

Chalcogenide glasses in the system AsxSe100-x, as well as As40Se60 and As50Se50 glasses doped with metals (Bi, Ge, Cd, Ag, Sn, Mn, Dy and Sm) were investigated by Raman spectroscopy. The Raman spectra of AsxSe100-x with 0 x 10 suggest that the majority building units are Se chains and Se8 closed rings. At higher As contents, new structural units are formed from As and Se atoms. The Raman profiles for x>50 are characterized by the presence of strong narrow bands indicating the high ordering in the structure of these glassy materials. The doped samples with small amounts of metals, 0.1 – 1.0 at.%, do not show appreciable changes in their short-range order structure, with the exception of the 0.5 at.% Dy-doped sample. For the sample As50Se50+7.5 at.% Sn, there is direct evidence for the formation of new Sn-based structural units, such as Sn(Se1/2)4 tetrahedra..

Keywords

Chalcogenide glass, Rare-earth ions, Raman spectroscopy.

Submitted at: April 19, 2005
Accepted at: May 26, 2005

Citation

M. S. Iovu, E. I. Kamitsos, C. P. E. Varsamis, P. Boolchand, M. Popescu, RAMAN SPECTRA OF AsxSe100-x GLASSES DOPED WITH METALS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 3, pp. 1217-1221 (2005)