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Saturated absorption and nonlinear refraction of silicate glasses doped with silver nanoparticles at 532 nm |
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| Authors: | RA Ganeev AI Ryasnyansky AL Stepanov T Usmanov |
| Institution: | (1) NPO Akadempribor, Akademgorodok, Uzbekistan;(2) Institute for Solid State Physics, The University of Tokyo, 5-1-5 Kashiwanoha, Chiba, Japan;(3) Samarkand State University, Smarkand, Uzbekistan;(4) Centre de la National de la Recherche Scientifique, Université Pierre et Marie Curie, France;(5) Institute for Experimental Physics and Erwin Schrödinger Institute for Nanoscale Research, Karl-Franzens-University Graz, Austria;(6) Kazan Physics-Technical Institute, Russian Academy of Sciences, Russia |
| Abstract: | The nonlinear optical characteristics of silicate glasses doped with silver nanoparticles are investigated by Z-scan technique using second harmonic radiation of picosecond Nd:YAG laser ( =532 nm,  =55 ps). The real and imaginary parts of third-order nonlinear susceptibility of silver-contained glasses were measured. It was found that the sign of Im
(3)was negative due to saturated absorption and the sign of Re
(3) was changed from negative (self-defocusing) to positive (self-focusing) with growth of laser radiation intensity. The mechanisms responsible for saturated absorption and nonlinear refraction are discussed. |
| Keywords: | nonlinear absorption nonlinear refraction silicate glass silver nanoparticles |
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