Abstract
We investigate the femtosecond laser filamentation in nanoparticle colloidal solutions. Colloidal solutions of water doped with gold (Au), silver (Ag), copper (Cu), and calcium carbonate (CaCO3) nanospheres under different sizes and concentrations were experimentally studied. A cyan–red light path was visualized, and the generated supercontinuum spectra spanning from 400 nm to 950 nm were obtained. It was found that the energy losses and frequency-dependent scattering are necessary prerequisites for generating a colorful light path.
Highlights
= 4.2 MW in pure water at 800 nm), a large amount of plasma is created in the medium.[10]
We investigate the femtosecond laser filamentation in nanoparticle colloidal solutions
One of the approaches is by doping the liquids with nanoparticles whose SPRs (Surface Plasmon Resonance)s overlap with the spectrum of either the fundamental or the SC light, since resonant nonlinearities can be several orders of magnitude stronger than nonresonant ones.[20–23]
Summary
Colloidal solutions of water doped with gold (Au), silver (Ag), copper (Cu), and calcium carbonate (CaCO3) nanospheres under different sizes and concentrations were experimentally studied. It was found that the energy losses and frequency-dependent scattering are necessary prerequisites for generating a colorful light path.
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