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Fluorescent photosensitive glass-ceramics – a novel media for optical data storage

E. ANDRONESCU1, S. JINGA1, E. ROTIU2, L. IONESCU2, C. MAZILU2, E. PAVEL3,* , D. PATROI4, M. DAVIDESCU5, V. VULPE5

Affiliation

  1. Department of Science and Engineering of Oxide Materials, Faculty of Chemical Engineering, Politehnica University, 1 Polizu Str., Bucharest, Romania
  2. National Glass Institute, 47, Theodor Pallady Str., Bucharest, Romania
  3. Storex Technologies, 274,Calea Mosilor Str., Bucharest, Romania
  4. National R&D Institute for Electrical Engineering, 313, Splaiul Unirii Str., Bucharest, Romania
  5. Center for Technological Electronics and Interconnection Techniques, Politehnica University,1-3, Iuliu Maniu Str., Bucharest, Romania

Abstract

A fluorosilicate glass-ceramic containing rare earths such as europium (Eu) was realized in order to be used as information 3D optical data storage media. Photosensitive agents: silver (Ag) and cerium (Ce) has been used for obtaining the photosensitivity properties. The material structure and properties were investigated by XRD, SEM, AFM, TEM, confocal microscopy and photoluminescence spectroscopy. The measurements revealed the presence of NaF nanocrystals having dimensions in the range of tens of nanometer. The zones having high nanocrystal population densities present a higher fluorescence. The results suggest that the fluorescent photosensitive glass-ceramics are promising candidates in the class of 3D information storage materials..

Keywords

Glass ceramics, Nanocrystals, Rare earths, Fluorescence, Photosensitivity.

Submitted at: Sept. 25, 2007
Accepted at: Feb. 18, 2008

Citation

E. ANDRONESCU, S. JINGA, E. ROTIU, L. IONESCU, C. MAZILU, E. PAVEL, D. PATROI, M. DAVIDESCU, V. VULPE, Fluorescent photosensitive glass-ceramics – a novel media for optical data storage, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 2, pp. 294-297 (2008)