ZHURNAL NEORGANICHESKOI KHIMII / Russian Journal of Inorganic Chemistry.
Федеральное государственное бюджетное учреждение "Российская академия наук".
Vol. 36.
1991.
P. 1487-1493
It has been shown experimentally, in the particular case of second-harmonic generation in a multilayer planar optical waveguide, that an amorphous heterojunction can have a significant quadratic nonlinearity. The possibility of "constructing" nonlinear media from ultrathin amorphous films is demonstrated.