Transmission study of germanium using free-electron laser



We have measured optical transmittance through germanium in the mid-infrared region at room temperature using the Osaka free-electron laser (FEL). In spite of the fact that germanium is transparent in the mid-infrared region, we observed strong suppression of optical transmission under high-intensity FEL excitation. We found that the observed suppression is due to optical absorption in germanium. To analyze the experimental results, we have calculated optical transmittance of germanium within Keldysh theory


ZnSe Wavelength Dependence Multiphoton Ionization Tunneling Ionization Intense Laser Field 


  1. 1.
    S. Adachi, J. Appl. Phys. 58, R1 (1985)CrossRefGoogle Scholar
  2. 2.
    C. Coluzza, E. Tuncel, J.L. Staehli, P.A. Baudat, G. Margaritondo, J.T. Mckinley, A. Ueda, A.V. Barnes, R.G. Albridge, N.H. Tolk, D. Martin, F. Morier-Genoud, C. Dupuy, A. Rudra, M. Ilegems, Phys. Rev. B 46, 12834 (1992)Google Scholar
  3. 3.
    K. Nishi, H. Ohyama, T. Suzuki, T. Mitsuyu, T. Tomimasu, Appl. Phys. Lett. 70, 2171 (1997)CrossRefGoogle Scholar
  4. 4.
    S. Graf, H. Sigg, K. Köhler, W. Bächtold, Phys. Rev. B 62, 10301 (2000)CrossRefGoogle Scholar
  5. 5.
    K.B. Nordstrom, K. Johnsen, S.J. Allen, A.P. Jauho, B. Birnir, J. Kono, T. Noda, H. Akiyama, H. Sakaki, Phys. Rev. Lett. 81, 457 (1998)CrossRefGoogle Scholar
  6. 6.
    B.E. Cole, J.B. Williams, B.T. King, M.S. Sherwin, C.R. Stanley, Nature 410, 60 (2001)CrossRefGoogle Scholar
  7. 7.
    N. Mori, T. Takahashi, T. Kambayashi, H. Kubo, C. Hamaguchi, L. Eaves, C.T. Foxon, A. Patanè, M. Henini, Physica. B 314, 431 (2002)CrossRefGoogle Scholar
  8. 8.
    T. Takahashi, T. Kambayashi, N. Mori, H. Kubo, C. Hamaguchi, N. Tsubouchi, Jpn. J. Appl. Phys. 41, 88 (2002)Google Scholar
  9. 9.
    T. Takahashi, N. Mori, Semicond. Sci. Technol. 19, S457 (2004)CrossRefGoogle Scholar
  10. 10.
    N. Mori, H. Nakano, H. Kubo, C. Hamaguchi, L. Eaves, Physica B 272, 431 (1999)CrossRefGoogle Scholar
  11. 11.
    J. Kono, M.Y. Su, T. Inoshita, T. Noda, M.S. Sherwin, S.J. Allen Jr., H. Sakaki, Phys. Rev. Lett. 79, 1758 (1997)CrossRefGoogle Scholar
  12. 12.
    L.V. Keldysh, Sov. Phys. JETP 20, 1307 (1965)Google Scholar
  13. 13.
    P.Y. Yu, M. Cardona, Fundamentals of Semiconductors, 2nd edn. (Springer-Verlag, Berlin, 1999)Google Scholar
  14. 14.
    O. Madelung, Semiconductors: Data Handbook, 3rd edn. (Springer-Verlag, Berlin, 2004)Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • H. Furuse
    • 1
  • N. Mori
    • 1
  • H. Kubo
    • 1
  • H. Momose
    • 1
  • M. Kondow
    • 1
  1. 1.Department of Electronic EngineeringOsaka UniversitySuita, OsakaJapan

Personalised recommendations