Laser ablation of gallium arsenide in different solutions |
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| Authors: | R A Ganeev A I Ryasnyanskii H Kuroda |
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| Institution: | (1) Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan;(2) Samarkand State University, Samarkand, 703004, Uzbekistan |
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| Abstract: | The optical, structural, and nonlinear optical characteristics of GaAs nanoparticles obtained by laser ablation in different liquids were investigated. Thermally induced self-defocusing in GaAs solutions was observed using both a high pulse repetition rate and nanosecond pulses. In studying the nonlinear optical characteristics of GaAs solutions using picosecond and femtosecond pulses, two-photon absorption was observed. The nonlinear absorption coefficient of an aqueous GaAs solution measured by the Z-scan technique and the nonlinear susceptibility of GaAs nanoparticles were, respectively, 0.7 × 10?9 cm W?1 and 2 × 10?9 esu at a wavelength of 795 nm. |
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