Gp. Banfi et al., BELOW BAND-GAP NONLINEAR-OPTICAL PROPERTIES OF SEMICONDUCTOR-DOPED GLASSES, Journal of nonlinear optical physics and materials, 5(2), 1996, pp. 205-222
Through nonlinear transmission and wave-mixing measurements, combined
with structural data from neutron scattering, we obtain the below band
-gap third-order susceptibility chi((3)) (both imaginary and real part
) and the refractive-index-change per carrier of semiconductor nanocry
stals embedded in a glass matrix. Our data covers a range of crystal r
adii between 2 and 14 nm and a range of ratios y = E(g)/(<(h)over bar
omega>), where E(g) is the energy gap of the semiconductor and <(h)ove
r bar omega> is the energy of the incident photon, between 1.1 and 1.9
. The magnitude of chi((3)) and its dependence on y are comparable to
those of related bulk semiconductors.