The reflectivity of a gallium/silica interface formed on an optical flat or at the tip of a cleaved optical fiber can be reduced in a reversible fashion when the interface is excited by a few milliwatts of laser power. This phenomenon occurs at temperatures just below gallium's melting point. We believe that the effect can be attributed to light-induced structuring at the interface.
© 2000 Optical Society of America
V. Albanis, R. T. Bratfalean, S. Dhanjal, N. I. Zheludev, V. I. Emel'yanov, P. Petropoulos, and D. J. Richardson, "Light-induced specular-reflectivity suppression at a gallium/silica interface," Opt. Lett. 25, 1594-1596 (2000)