Saturated absorption and nonlinear refraction of silicate glasses doped with silver nanoparticles at 532 nm
- Cite this article as:
- Ganeev, R., Ryasnyansky, A., Stepanov, A. et al. Optical and Quantum Electronics (2004) 36: 949. doi:10.1007/s11082-004-3392-x
- 322 Downloads
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 (λ=532 nm, τ=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 Imχ(3)was negative due to saturated absorption and the sign of Reχ(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.