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Photonic irradiation induces nano-structures – an EPR study

C. FLOREA1,* , S. GEORGESCU2

Affiliation

  1. ESIEE (Ecole Supérieure d'Ingénieurs en Electronique et Electrotechnique de Paris) B.P. 99 – F93162 NOISY-LE-GRAND cedex France
  2. NILPRP (National Institute for Lasers, Plasma, and Radiation Physics) 409 Atomistilor Street / P.O. Box MG-54 RO-77125 Romania

Abstract

During the irradiation of fluorite (CaF2) with photons (X) we observe the formation of nano ordered structures (inclusions). This forming structure is homothetic in relation to the fluorine ions of the crystal. The particles of approximately 10 nm size agglomerate and form nanostructures structures with parallelipipedic shape. The length of these structures varies between 30 and 3000 nm. The local changes of symmetry produced by the formation of the nano structures can be inferred from EPR measurements on Kramers rare earth ions introduced in CaF2..

Keywords

Nanostructures structures with parallelipipedic shape, Kramers rare earth ions, F centers, Local symmetry change, Exciton, G ) tensor, Trigonal axes, Tetragonal spectrum.

Submitted at: March 15, 2007
Accepted at: Aug. 18, 2007

Citation

C. FLOREA, S. GEORGESCU, Photonic irradiation induces nano-structures – an EPR study, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 8, pp. 2303-2307 (2007)