Optics and Spectroscopy

, Volume 113, Issue 4, pp 383–387

Interband phototransitions involving free electrons: Part II. Crystals with an indirect band gap

Condensed-Matter Spectroscopy

Abstract

Nonlinear absorption of laser radiation with a photon energy lower than the indirect band gap of crystal has been considered. It is shown that, as in the case of direct-gap materials, single-photon resonance at the transitions between two conduction bands even at radiation intensities j ∼ 105–106 W/cm2 yields a range of j values where optical absorption and concentration of nonequilibrium electron-hole pairs increase very sharply with an increase in j.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    E. Yu. Perlin, A. V. Ivanov, and A. A. Popov, Opt. Spektrosk. 113(4), 376 (2012).CrossRefGoogle Scholar
  2. 2.
    L. Töben, L. Gundlach, T. Hannappel, R. Ernstorfer, R. Eichberger, and F. Willig, Appl. Phys. A 78, 239 (2004).ADSCrossRefGoogle Scholar
  3. 3.
    D. Fritsch, H. Schmid, and M. Grundmann, Phys. Rev. A 67, 235205 (2003).Google Scholar

Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  1. 1.Center of Information Optical TechnologiesSt. Petersburg State University of Information Technologies, Mechanics, and OpticsSt. PetersburgRussia

Personalised recommendations