Advertisement

Frequency Dependence of Interband Two-Photon Absorption Mechanisms in ZnO and ZnS

  • I. M. Catalano
  • A. Cingolani
  • M. Lepore
Part of the NATO ASI Series book series (NSSB, volume 200)

Abstract

The transition mechanism changes involved in direct interband two-photon absorption (TPA) processes have been studied in two II–VI compounds:ZnO and ZnS. The experimental results have indicated that the transition mechanism nature changes when the excitation energy is varied. The transitions are of an allowed-allowed type near the energy gap and become of an allowed-forbidden type far from it. In particular, for ZnO when 2ħw-Ey > ~ 400 meV the first experimental evidence of a dominant mechanism of forbidden-forbidden type has been obtained. Furthermore, the spectral behaviour of the TPA coefficient (α(2)) has been well described by a parametric formula containing terms (with different energy dependences) related to the above-mentioned different transition mechanisms.

Keywords

Matrix Element Line Shape Transition Type Spectral Dependence Transition Mechanism 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Reference

  1. [1]
    I.M. Catalano, A. Cingolani and M. Lepore, Phys.Rev.B, 33, 7270, (1986);ADSCrossRefGoogle Scholar
  2. [1a]
    I.M. Catalano, A. Cingolani and M. Lepore, Solid State Coram. 60, 385, (1986)ADSCrossRefGoogle Scholar
  3. [1b]
    I.M. Catalano, A. Cingolani and M. Lepore, Il Nuovo Cimento, 9D, 1313, (1987)ADSCrossRefGoogle Scholar
  4. [1c]
    I.M. Catalano, A. Cingolani and M. Lepore, Physica Scripta, 37, 579, (1988)ADSCrossRefGoogle Scholar
  5. [2]
    G.D. Mahan, Phys.Rev. 170, 825, (1968)ADSCrossRefGoogle Scholar
  6. [3]
    J.P. van der Ziel, Phys.Rev.B, 16, 2775, (1976)CrossRefGoogle Scholar
  7. [4]
    I.M. Catalano and A. Cingolani, J.Appl.Phys. 50, 5638, (1968)ADSCrossRefGoogle Scholar
  8. [5]
    G. Kobbe and C. Klingshirn, Z. Phys. B, 37, 9, (1980)ADSCrossRefGoogle Scholar
  9. [6]
    A.R. Hassan, Il Nuovo Cimento, 70B, 21, (1970)ADSGoogle Scholar
  10. [7]
    A. Vaidyanathan, T. Walker, A.H. Guenther, S.S. Mitra and R.R. Narducci, Phys.Rev. 24, 2259, (1981)ADSCrossRefGoogle Scholar
  11. [8]
    R. Braunstein and N. Ockman, Phys.Rev. 134, A449, (1964)CrossRefGoogle Scholar
  12. [9]
    A. Vaidyanathan, A.H. Guenther and S.S. Mitra, Phys.Rev.B, 22 6480, (1980)ADSCrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • I. M. Catalano
    • 1
  • A. Cingolani
    • 1
  • M. Lepore
    • 1
  1. 1.Dipartimento di FisicaUniversita’di BariBariItaly

Personalised recommendations