On the origin of the optical nonlinearity of a gallium-silica interface
arXiv:physics/0101056 · doi:10.1103/PhysRevB.64.193312
Abstract
Simultaneous measurements of the intensity and phase of a probe wave reflected from an interface between silica and elemental alpha-gallium reveal its very strong optical nonlinearity, affecting both these parameters of the reflected wave. The data corroborate with a non-thermal mechanism of optical response which assumes appearance of a homogeneous highly metallic layer, only a few nanometer thick, between the silica and bulk alpha-gallium.
12 pages, 5 figures, to be published in Optics Letters