Advertisement

Pramana

, Volume 48, Issue 4, pp 929–935 | Cite as

Electron paramagnetic resonance studies of photorefractive crystals II: Fe3+ doped Bi12SiO20 with copper vapour laser illumination in 10–100 K range

  • N K Porwal
  • R M Kadam
  • Y Babu
  • M D Sastry
  • M D Aggarwal
  • Putcha Venkateswarlu
Article

Abstract

Photo-induced charge transfer and its kinetics were investigated in Bi12SiO20 in 10–300 K temperature range, using EPR of Fe3+ centre, underin situ illumination with copper vapour laser (CVL). The decay kinetics was found to follow double exponential behaviour. Relaxation of the photo-induced electron transfer to the preillumination condition occurred even at 10 K. Shallow traps were, therefore, associated with the electron trapping, leading to a better understanding of the fast photorefractive response of BSO.

Keywords

Electron paramagnetic resonance bismuth silicon oxide photorefraction laser 

PACS No.

76.30 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    P Günter and J P Huignard (eds),Topics in applied physics: photorefractive materials and their applications I (Springer-Verlag, 1988)Google Scholar
  2. [2]
    A M Glass,Opt. Eng. 17, 47 (1978)Google Scholar
  3. [3]
    N K Porwal, Mithlesh Kumar and M D Sastry,Pramana — J. Phys. 47, 481 (1996)ADSGoogle Scholar
  4. [4]
    M G Jani and L E Halliburton,J. Appl. Phys. 64, 2022 (1988)CrossRefADSGoogle Scholar
  5. [5]
    J A Baquedano, F J Lopez and J M Cabrera,Solid State Commun. 72, 233 (1989)CrossRefADSGoogle Scholar
  6. [6]
    S C Abrahams, P B Jamieson and J L Bernstein,J. Chem. Phys. 47, 4034 (1967)CrossRefADSGoogle Scholar
  7. [7]
    A E Attard and T X Brown,Optics 25, 3253 (1986)ADSGoogle Scholar

Copyright information

© the Indian Academy of Sciences 1997

Authors and Affiliations

  • N K Porwal
    • 1
  • R M Kadam
    • 1
  • Y Babu
    • 1
  • M D Sastry
    • 1
  • M D Aggarwal
    • 1
    • 2
  • Putcha Venkateswarlu
    • 1
    • 2
  1. 1.Radiochemistry DivisionBhabha Atomic Research CentreTrombay, MumbaiIndia
  2. 2.Department of PhysicsAlabama A&M UniversityNormal, AlabamaUSA

Personalised recommendations