Abstract
Silver-doped silicon thin films were deposited on glass substrate in a co-sputtering procedure. Silver nanoparticles were segregatedly distributed. The nonlinear properties were extracted by z-scan measurements at low laser input power. For about 50% silver density, the nonlinear absorption and refraction coefficients peaked, respectively, at −8.086×10−2 m/W and 1.47×10−9 m2/W, which, with respect to the input intensity, are several orders higher than reported data. The sudden surge of nonlinear responses was explained satisfactorily based on a self-consistent microscopic model calculation for silver clusters. Resonances exist and depend apparently on the laser-modified local cluster concentration.
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Wei, J., Liu, J. & Xiao, M. Giant optical nonlinearity of silver-doped silicon thin film at low power input: laser-triggered cluster resonance. Appl. Phys. A 104, 1031–1037 (2011). https://doi.org/10.1007/s00339-011-6464-3
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DOI: https://doi.org/10.1007/s00339-011-6464-3