Skip to main content
SpringerLink
Log in

Determination of free-carrier and phonon-assisted absorptions for Si-doped GaSb thin layers

  • Published:
Applied Physics A Aims and scope Submit manuscript

Abstract

Photothermal deflection spectroscopy is used in order to investigate near- and sub-band gap absorption of Si-doped GaSb epilayers deposited by MBE on a semi-insulating GaAs substrate. The optical absorption spectra show an extra absorption on the transparency region below the bandgap due to free-carrier absorption. However, for energies above the gap, we notice a linear behavior of the square root of the absorption coefficient versus the heating beam energy, which is attributed to phonon-assisted absorption. From interpolation of the phonon absorption to low energies we have determined the free-carrier absorption that is found to follow the Drude law.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8

Similar content being viewed by others

References

  1. D. Barat, J. Angellier, A. Vicet, Y. Rouillard, L. Le Gratiet, S. Guilet, A. Martinez, A. Ramdane, Appl. Phys. B 90, 201 (2008)

    Article  ADS  Google Scholar 

  2. D.J. Nicholas, M. Lee, B. Hamilton, K.E. Singer, J. Cryst. Growth 81, 298 (1987)

    Article  ADS  Google Scholar 

  3. L. Tirado-Mejía, J.A. Villada, M. de los Ríos, J.A. Peñafiel, G. Fonthal, D.G. Espinosa-Arbeláez, H. Ariza-Calderón, M.E. Rodríguez-García, Physica B, Condens. Matter 403, 4027 (2008)

    Article  ADS  Google Scholar 

  4. T.M. Rossi, D.A. Collins, D.H. Chow, T.C. McGill, Appl. Phys. Lett. 57, 2256 (1990)

    Article  ADS  Google Scholar 

  5. Y.K. Su, H. Kuan, P.H. Chang, J. Appl. Phys. 73, 56 (1993)

    Article  ADS  Google Scholar 

  6. F. Saadallah, N. Yacoubi, F. Genty, C. Alibert, Appl. Opt. 41(36), 7561 (2002)

    Article  ADS  Google Scholar 

  7. F. Saadallah, N. Yacoubi, F. Genty, C. Alibert, J. Appl. Phys. 94(8), 1 (2003)

    Article  ADS  Google Scholar 

  8. Photothermal and Photoacoustic Spectroscopic Measurements. Handbook of Optical Constants (1998), p. 88, vol. III

  9. J. Tauc, R. Grigorovici, A. Vancu, Phys. Status Solidi 15, 627 (1966)

    Article  Google Scholar 

  10. S.E. Aw, H.S. Tan, C.K. Ong, J. Phys. Condens. Matter 3, 8213 (1991)

    Article  ADS  Google Scholar 

  11. J. Willekens, M. Brinza, T. Gungor, G.J. Adriaenssens, M. Nesladek, W.M.M. Kessels, A.H.M. Smets, M.C.M. Van de Sanden, J. Non-Cryst. Solids 338, 244 (2004)

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Photothermal Laboratory of Nabeul, IPEIN, BP 62, Mrezka, 8000, Nabeul, Tunisia

    Faycel Saadallah, Sameh Abroug & Noureddine Yacoubi

  2. IES, Université Montpellier 2, Montpellier, France

    Férederic Genty

Authors
  1. Faycel Saadallah
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Sameh Abroug
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Férederic Genty
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Noureddine Yacoubi
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Faycel Saadallah.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Saadallah, F., Abroug, S., Genty, F. et al. Determination of free-carrier and phonon-assisted absorptions for Si-doped GaSb thin layers. Appl. Phys. A 113, 729–733 (2013). https://doi.org/10.1007/s00339-013-7571-0

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00339-013-7571-0

Keywords

Search

Navigation