Nonlinear Spectroscopy of Excitons in CuCl

  • S. D. Kramer
  • N. Bloembergen
Part of the Optical Physics and Engineering book series (OPEG)


The sharp Z3 exciton level in CuCl which at liquid helium temperatures lies about 3.21 eV above the valence band has been investigated extensively by linear (One photon) absorption spectroscopy,1–3 by second harmonic generation,4 by two photon absorption spectroscopy,5,6 and by four wave light mixing.7 The first two methods require that ultra-violet radiation with an energy near that of the exciton be detected. Since the absorption depth in this wavelength region is about 10−5 cm, only excitons in the immediate vicinity of a surface can be probed. In general the surface of a CuCl crystal is apt to be chemically contaminated and physically imperfect. As a result, no reliable and precise data about exciton line shape and damping can be obtained with these methods.


Dispersion Curve Wave Light Photon Absorption Transparent Region Exciton Energy 
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Copyright information

© Plenum Press, New York 1975

Authors and Affiliations

  • S. D. Kramer
    • 1
  • N. Bloembergen
    • 1
  1. 1.Gordon McKay LaboratoryHarvard UniversityCambridgeUSA

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