Advertisement

Physics of the Solid State

, Volume 60, Issue 8, pp 1618–1624 | Cite as

Critical Dependence of the Excitonic Absorption in Cuprous Oxide on Experimental Parameters

  • J. Heckötter
  • M. Freitag
  • M. Aßmann
  • D. Fröhlich
  • M. Bayer
  • P. Grünwald
  • S. Scheel
Optical Properties
  • 35 Downloads

Abstract

We study the modification of the exciton absorption in cuprous oxide by the presence of free carriers excited through above band gap excitation. Without this pumping, the absorption spectrum below the band gap consists of the yellow exciton series with principal quantum numbers up to more than n = 20, depending on the temperature, changing over to an about constant, only slowly varying absorption above the gap. Careful injection of free carriers, starting from densities well below 1 μm–3, leads to a reduction of the band gap through correlation effects. The excitons in the Rydberg regime above n = 10 remain unaffected until the band gap approaches them. Then they lose oscillator strength and ultimately vanish upon crossing with the band gap.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    C. F. Klingshirn, Semiconductor Optics (Springer, Berlin, 2012).CrossRefGoogle Scholar
  2. 2.
    N. F. Mott, Rev. Mod. Phys. 40, 677 (1968); G. B. Norris and K. K. Bajaj, Phys. Rev. B 26, 6706 (1982).ADSCrossRefGoogle Scholar
  3. 3.
    M. Capizzi, S. Modesti, A. Frova, J. L. Staehli, M. Guzzi, and R. A. Logan, Phys. Rev. B 29, 2028 (1984); J. Collet, J. Phys. Chem. Solids 46, 417 (1985).ADSCrossRefGoogle Scholar
  4. 4.
    D. Semkat, F. Richter, D. Kremp, G. Manzke, W.-D. Kraeft, and K. Henneberger, Phys. Rev. B 80, 155201 (2009).ADSCrossRefGoogle Scholar
  5. 5.
    J. Brandt, D. Fröhlich, C. Sandfort, M. Bayer, H. Stolz, and N. Naka, Phys. Rev. Lett. 99, 217403 (2007).ADSCrossRefGoogle Scholar
  6. 6.
    E. F. Gross and N. A. Karrjew, Dokl. Akad. Nauk SSSR 84, 471 (1952).Google Scholar
  7. 7.
    E. F. Gross, Nuovo Cimento 4, 672 (1956).CrossRefGoogle Scholar
  8. 8.
    F. Schöne, S.-O. Krüger, P. Grünwald, H. Stolz, S. Scheel, M. Aßmann, J. Heckötter, J. Thewes, D. Fröhlich, and M. Bayer, Phys. Rev. B 93, 075203 (2016).ADSCrossRefGoogle Scholar
  9. 9.
    M. Aßmann, J. Thewes, D. Fröhlich, and M. Bayer, Nat. Mater. 15, 741 (2016).ADSCrossRefGoogle Scholar
  10. 10.
    Ch. Uihlein, D. Fröhlich, and R. Kenklies, Phys. Rev. B 23, 2731 (1981).ADSCrossRefGoogle Scholar
  11. 11.
    R. J. Elliott, Phys. Rev. 108, 1384 (1957).ADSCrossRefGoogle Scholar
  12. 12.
    T. Itoh and S. Narita, J. Phys. Soc. Jpn. 39, 140 (1975).ADSCrossRefGoogle Scholar
  13. 13.
    S. John, C. Soukoulis, M. H. Cohen, and E. N. Economou, Phys. Rev. Lett. 57, 1777 (1986).ADSCrossRefGoogle Scholar
  14. 14.
    J. Heckötter, M. Freitag, D. Fröhlich, M. Aßmann, M. Bayer, P. Grünwald, F. Schöne, D. Semkat, H. Stolz, and S. Scheel, arXiv:1709.00891 [condmat. mtrl-sci].Google Scholar
  15. 15.
    H. Haug and S. Koch, Quantum Theory of the Optical and Electronic Properties of Semiconductors (Word Scientific, Singapore, 1993).CrossRefzbMATHGoogle Scholar
  16. 16.
    R. Zimmermann, Phys. Status Solidi B 146, 371 (1988); G. Manzke, D. Semkat, F. Richter, D. Kremp, and K. Henneberger, J. Phys.: Conf. Ser. 210, 012020 (2010); R. Zimmermann, K. Kilimann, W. D. Kraeft, D. Kremp, and G. Röpke, Phys. Status Solidi B 90, 175 (1978); G. Manzke, D. Semkat, and H. Stolz, New J. Phys. 14, 095002 (2012).ADSCrossRefGoogle Scholar
  17. 17.
    H. Stolz, R. Schwartz, F. Kieseling, S. Som, M. Kaupsch, S. Sobkowiak, D. Semkat, N. Naka, Th. Koch, and H. Fehske, New J. Phys. 14, 105007 (2012); R. Schwartz, N. Naka, F. Kieseling, and H. Stolz, New J. Phys. 14, 023054 (2012).ADSCrossRefGoogle Scholar
  18. 18.
    D. Kremp, M. Schlanges, and W.-D. Kraeft, Quantum Statistics of Nonideal Plasmas (Springer, Berlin, 2005).zbMATHGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • J. Heckötter
    • 1
  • M. Freitag
    • 1
  • M. Aßmann
    • 1
  • D. Fröhlich
    • 1
  • M. Bayer
    • 1
  • P. Grünwald
    • 2
  • S. Scheel
    • 2
  1. 1.Experimentelle Physik 2Technische Universität DortmundDortmundGermany
  2. 2.Institut für PhysikUniversität RostockRostockGermany

Personalised recommendations