"

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.

The spontaneous emission probabilities for Ga-La-S:Pr3+ glass

A. NISTREANU1,* , N. ENACHI1, M. IOVU1, V. KOROLI2, D. FURNISS3, A. SEDDON3

Affiliation

  1. Institute of Applied Physics, Academy of Science of Moldova, Str. Academiei 5, MD- 2028 Chisinau, R. Moldova
  2. Institute of Chemistry, Academy of Science of Moldova, Str. Academiei 3, MD- 2028 Chisinau, R. Moldova
  3. Novel Photonic Glasses Group, University of Nottingham, Nottingham N67 2RD, UK

Abstract

The absorption and emission spectra of chalcogenide glasses (Ga-La-S:O) doped with trivalent Praseodymium were experimentally investigated and theoretically discussed. The glasses show bright luminescence due to Pr3+ ion emission. The effect of oxygen on the luminescence spectra is determined by decreasing of host glass self-absorption of the shortwavelength bands. In order to obtain the good agreement between the theoretical model and experimental results we apply the Judd-Ofelt theory for this glass matrix. Radiative transition rates are calculated and compared with measured experimental parameters. The radiative and non-radiative transition processes between the energy levels of the Pr3+ ions stimulated by optical and acoustical vibration modes are proposed in order to obtain the quantitative correlation between the proposed theoretical model and experimental results..

Keywords

: Judd-Ofelt theory, Pr3+, Rare-earth doped chalcogenide glasses, Optical absorption, Ga-La-S.

Submitted at: April 7, 2010
Accepted at: April 26, 2010

Citation

A. NISTREANU, N. ENACHI, M. IOVU, V. KOROLI, D. FURNISS, A. SEDDON, The spontaneous emission probabilities for Ga-La-S:Pr3+ glass, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 4, pp. 800-805 (2010)