Laser-induced synergetic phenomena in impure semiconductors

It is shown that the energy flux due to a laser light passing through a disordered system represented by a semiconductor with impurities causes the self-organization of new ordered states and gives rise to physical phenomena typical of synergetics generally described byHaken. The properties of these ordered states remind one distantly of those of ordinary superconductors and pure crystals. Theoretical explanations of the observed phenomena concerning the optical stopping effect and the light-induced transmittance oscillations in thin films are given. New sorts of the phase transitions of the first order and the electron diffraction on disordered systems illuminated by a laser light are predicted.The author is very much indebted to Dr. . Bárta for stimulating discussions and for his information on the experimental existence of the light-induced transmittance oscillations in thin film.