Calculation of optical excitations in cubic semiconductors. II. Second-harmonic generation

Microscopic study of surface second-harmonic generation from a clean Si(100)c(4×2)surface

“…Similar analyses have been presented in Ref. 16 for bulk SHG from cubic semiconductors, and in Ref. 17 for surface SHG from As terminated Si͑111͒.…”

Ab-initio investigation of structural, electronic and optical properties of InxGa1−xAs, GaAs1−yPy ternary and InxGa1−xAs1−yPy quaternary semiconductor alloys

“…With the help of these obtained functions, the energy loss function coefficient L(ω), refraction index n(ω), extinction coefficient k(ω), absorption coefficient˛(ω) and reflection R(ω) are calculated at two phases. The calculated values are compared with existing theoretical [26][27][28] and experimental [39][40][41][42][43][44][45] studies and it is found that there is a general harmony. In Fig.…”

“…These obtained results are compared with other theoretical and experimental studies. It is found out that the lattice constant for GaAs is 0.5% greater than theoretical value [26,27] and 2% less than experimental value [28]. The minimum value of lattice constant a 0 is obtained as 5.58 Å for GaAs structure and the maximum value is obtained as 5.82 Å for In x Ga 1−x As.…”

Influence of crystal structure and quasiparticle effects on second-harmonic generation: Silicon carbide polytypes

“…Taking advantage of point-group symmetry as well as time-reversal symmetry allows to construct invariants for the matrix elements in Eq. ͑2͒ and to restrict the BZ integration to the irreducible part, i.e., a 1 12 th wedge of the hexagonal BZ. For a careful treatment of the Dirac ␦ functions as well as of the energy denominators occurring in Eq.…”

“…[1][2][3][4][5][6] This development is motivated by the rapid advances in the electro-optical technology and the all-optical information technology. On the other hand, nonlinear optical properties are much more influenced by the atomic and electronic structure of the material under consideration than linear ones.…”