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Decay of two indirect excitons to direct and to indirect exciton state in thallous halides

  • Jun'ichirō Nakahara
  • Koichi Kobayashi
Excitonic Molecules
Part of the Lecture Notes in Physics book series (LNP, volume 57)

Abstract

Emissions from highly purified TIC1 and TlBr are studied. The emission due to the radiative decay of the molecule of X 6 + xR 6 excitons by leaving one X 6 + xR 6 exciton and one M-point phonon through indirect process is found in the vicinity of the absorption edge. The emission due to the radiative decay of two X 6 + xR 6 excitons at the same M-point with leaving one X 6 + xX 6 exciton at the P-point through zero-phonon process is observed at the energy far lower than the edge.

Keywords

Radiative Decay Excitation Intensity Exciton State Edge Emission Hydrogen Halide 
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References

  1. 1).
    J. Nakahara, K. Kobayashi and A. Fujii: J. Phys. Soc. Japan 37 (1974) 1312; ibid. 37 (1974) 1319.Google Scholar
  2. 2).
    J. Nakahara and K. Kobayashi: J. Phys. Soc. Japan 40 (1976) 180.Google Scholar
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    K. Cho: Optics Commun. 8 (1973) 412.Google Scholar
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    O. Akimoto and E. Hanamura: J. Phys. Soc. Japan 33 (1972) 1537; ibid. 35 (1973) 973.Google Scholar
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    S. Kurita, K. Kobayashi and Y. Onodera: Progr. theor. Phys. Suppl. No.57 (1975) 10.Google Scholar
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    S. Kurita and K. Kobayashi: J. Phys. Soc. Japan 30 (1971) 1645.Google Scholar
  7. 7).
    The energy of the triplet state of the X6+ x X6 exciton in TlBr is not known. We assume that the energy separations between the three levels in TlBr are proportional to those in TlC1. We then estimate the energy of the triplet state in TIBr from the observed energy separations between three levels in TlC1 and the observed energy separation between two singlet-triplet states in TlBr.Google Scholar

Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • Jun'ichirō Nakahara
    • 1
  • Koichi Kobayashi
    • 1
  1. 1.Institute for Solid State PhysicsUniversity of TokyoMinato-ku, TokyoJapan

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