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(a) Arrangements for modulation of light with light and control over light-SPP wave coupling in a glass structure in the Otto configuration. (b), (c) Field distributions in the vicinity of the glass structure calculated for (b) and (c) phases of gallium.
Angular dependence of reflectivity from the glass structure. Closed and open symbols represent and metallic gallium phases, respectively. Triangles and circles denote and polarizations of the incident light. The vertical arrow shows the reflectivity change that can be achieved by a complete transformation of the gallium film from the phase into the metallic phase. The inset shows the theoretical dependence of reflectivity on the thickness of the metallic phase of gallium.
Transient reflectivity of the glass structure following impulse excitation at a wavelength of for various interface temperatures. The angle of incidence is . The inset shows the dependence of the maximum reflectivity increase on control wave fluence at .
Temperature dependence of the maximum reflectivity increase ) and corresponding relaxation time () at .
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