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Sökning: WFRF:(Bila R.V.)

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1.
  • Semchuk, O. Yu., et al. (författare)
  • Features of coherent laser beams interaction with condensed matter
  • 2004
  • Ingår i: Appl. Surf. Sci.. - : Elsevier BV. - 0169-4332. ; 234:1-4, s. 415-421
  • Tidskriftsartikel (refereegranskat)abstract
    • Some mechanisms of formation of laser-induced periodic surface and bulk structures in condensed matter are considered. Their influence on optical properties of semiconductors is investigated. It is shown that under action of coherent laser beams (CLBs) a grating of the refraction index arises in semiconductors. The models featuring this effect are offered. The relevant theoretical calculations confirming occurrence the new phenomenon — appearance of a grating of the refractive index in semiconductors in a field of CLBs — were carried out. It is shown that in ferromagnetic semiconductors (FMSC) with a laser-induced grating of the magnon temperature one probably deals with occurrence of the nonlinearity of the refraction index caused by the nonlinearity of FMSC magnetic susceptibility and one should observe oscillations of a refraction index, which will result in occurrence of complementary darkened areas.
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2.
  • Semchuk, O. Yu., et al. (författare)
  • Features of transport phenomenas in magnetic semiconductors with laser-induced periodic nanostructures
  • 2007
  • Ingår i: Materials Science & Engineering. - : Elsevier BV. - 0921-5093 .- 1873-4936 .- 0928-4931 .- 1873-0191. ; 27:5-8, s. 1360-1363
  • Tidskriftsartikel (refereegranskat)abstract
    • The mechanisms of formation of the laser-induced periodic surface and bulk nanostructures in magnetic semiconductors are considered. Their influence on transport phenomena in ferromagnetic semiconductors (FMSC) is investigated. It is shown that under action of laser beams (LB) a laser-induced periodic nanostructures — gratings of the electron and magnon temperatures, electron concentration and electric fields arises in FMSC. It is determined, that the illuminating of an external surface of the FMSC by several LB results in an emerging new effect — appearance of a dropping site on the voltage-current characteristic (VCC) of the FMSC with the static laser-induced periodic nanostructures. This effect can only be observed for the carrier concentration n ≥ 1018 cm−3, since for smaller concentration the contribution of an additional current caused by the presence of the laser-induced periodic nanostructures will be insignificant.
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Willander, Magnus, 1 ... (2)
Karlsteen, Magnus, 1 ... (2)
Semchuk, O. Yu. (2)
Bila, R. V. (2)
Grechko, L. G. (1)
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Göteborgs universitet (1)
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