Nonlinear optical response of silver and copper nanoparticles in the near-ultraviolet spectral range
R. A. GaneevAkadempribor Research-and-Production Association, National Academy of Sciences of Uzbekistan, Tashkent, 700143, UzbekistanA.I. RyasnyanskyА. Л. СтепановZavoiskii Physicotechnical Institute, Kazan Scientific Center, Russian Academy of Sciences, Sibirskii trakt 10/7, Kazan 29, 420029, Tatarstan, RussiaT. UsmanovAkadempribor Research-and-Production Association, National Academy of Sciences of Uzbekistan, Tashkent, 700143, Uzbekistan
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The nonlinear optical response of silver and copper nanoparticles synthesized by ion implantation in silica glasses is studied in the near-ultraviolet spectral range at a wavelength of 354.7 nm. The real and imaginary parts of the third-order nonlinear susceptibility χ(3) of composite materials are measured. It is shown that the quantity Imχ(3) is due to saturated absorption, while Reχ(3) is due to the self-defocusing effect in composite materials.
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