%0 Journal Article
%A Bergfeld, S.
%A Daum, W.
%T Second-harmonic generation in GaAs : experiment verus theoretical predictions of X(2)xyz
%J Physical review letters
%V 90
%@ 0031-9007
%C College Park, Md.
%I APS
%M PreJuSER-28933
%P 036801-1
%D 2003
%Z Record converted from VDB: 12.11.2012
%X For GaAs we have determined \chi(xyz)((2))(-2omega; omega, omega)\ in second-harmonic generation experiments using two-photon energies between 2 and 5 eV. In addition to the E-1, E-1 + Delta(1), E-0', and E-2 critical-point bulk transitions of GaAs, a surprisingly strong surface transition at 3.35 eV was observed for natively oxidized GaAs(001) samples. A detailed comparison with theoretical predictions reveals that calculations that include many-particle effects at the level of the "scissors" approximation can describe the overall frequency dependence of the second-harmonic susceptibility reasonably well.
%K J (WoSType)
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000180579200042
%R 10.1103/PhysRevLett.90.036801
%U https://juser.fz-juelich.de/record/28933