Size Effects of Saturable and Reverse Saturable Absorption in Silver Nanoparticles and Ultrafast Dynamics

Saturable absorption and reverse saturable absorption are of particular interest in studies of the nonlinear optical properties of nanoparticles under resonant excitation. Nonlinear absorption mechanisms of chemically generated silver nanoparticles in deionized water were examined using femtosecond laser pulses at 400 nm. Our nonlinear absorption research shows that saturable absorption and two-photon absorption in generated Ag NPs compete with one another depending on the size of the nanoparticles. Damped oscillation, a by-product of radial breathing mode oscillation caused by acoustic vibration, has been observed in Ag NPs stimulated at 400 nm.

Keywords

Nanoparticles; Nonlinear; Absorption; Metal nanoparticles; Optical limiting; Multifunctionality

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Revista internacional de desarrollo e investigación de fármacos

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Abstracto

Size Effects of Saturable and Reverse Saturable Absorption in Silver Nanoparticles and Ultrafast Dynamics