Stationary and transient analysis of photoconductivity and photorefractivity in CdZnTe : Ge


MARTEL G., HIDEUR A., LEFEBVRE C., Ozkul C., HAGE-ALI M., KOEBBEL J.

APPLIED PHYSICS B-LASERS AND OPTICS, vol.70, no.1, pp.77-84, 2000 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 70 Issue: 1
  • Publication Date: 2000
  • Doi Number: 10.1007/s003400050012
  • Journal Name: APPLIED PHYSICS B-LASERS AND OPTICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.77-84
  • Istanbul Technical University Affiliated: No

Abstract

Photoconductivity and photorefractive two-wave-mixing in a diffusion regime have been analyzed in a germanium-doped Cd(0.99)Zn(0.01)Te crystal at lambda = 1.064 mu m. Temporal responses present a transient enhancement depending on total illumination and temperature. This enhancement depends also on the initial illumination present on the crystal. Steady-state photorefractive gain is rather high and presents an intensity-temperature resonance phenomenon. In addition, preliminary measurements have been performed at lambda = 1.55 mu m. More classical behavior has been observed and a relatively lower photorefractive gain has been measured. We interpret these differences in terms of multiple captures induced by at least two deep traps and a shallow trap located within the band gap of the material. Experimental results show this material to have very promising prospects for further photorefractive developments.