| Fundamentals and Physical concepts of optical limiting (OL) phenomenon in nanometal have been reviewed in this manuscript.Two mechanisms of OL are based on nonlinear absorption and nonlinear refraction depends on the setup of the experiments. The effect of surface plasmon resonance (SPR) absorption of nanometal, as well as their size, shape, material, and concentration on their OL behavior are discussed in detail. Finally, OL phenomenon is investigated experimentally using gold and silver NPs suspensions in water, in low intensity regime. In addition, results based on the effects of laser intensity, aperture size, concentration, and size of Au and Ag NPs are presented. |
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