Abstract
Sn+ ions were implanted into silica glass at an acceleration energy of 400 keV to a dose of 2×1017 ions/cm2. Metallic Sn microcrystallites of 4–20 nm in diameter were formed to attain the average volume fraction of 28%. The dielectric function, ε, and the absolute value of the third-order optical nonlinear susceptibility, ‖χ(3)‖, showed dispersions around a wavelength of 500 nm, owing to surface plasmon resonance. The difference in the peak width of ‖χ(3)‖ and the imaginary part of ε can be explained by an effective medium theory. The maximum of ‖χ(3)‖ was 3×10−6 esu, which is as large as those reported for semiconductor-doped glasses.
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