Interband phototransitions involving free electrons: Part II. Crystals with an indirect band gap
- 66 Downloads
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.
KeywordsLower Conduction Band Band Extremum Laser Pulse Energy Density Electron Coulomb Interaction Initial Electron Concentration
Unable to display preview. Download preview PDF.
- 3.D. Fritsch, H. Schmid, and M. Grundmann, Phys. Rev. A 67, 235205 (2003).Google Scholar