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On the origin of the optical nonlinearity of a gallium-silica interface

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.

preprint2001arXivOpen access
P. PetropoulosH. S. KimD. J. RichardsonV. A. FedotovN. I. Zheludev
physics.optics
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P. PetropoulosH. S. KimD. J. RichardsonV. A. FedotovN. I. Zheludev

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