Based on Fresnel-Kirchhoff diffraction theory, we set up a diffraction model of nonlinear optical media to Gaussian beam, which can interpret the Z-scan phenomenon from a new way. This theory is not only well consistent with the conventional Z-scan theory
The third-order susceptibility of multiwalled carbon nanotubes (MWCNTs) grown on Si substrate were measured using reflective Z-scan (RZ-scan) technique with femto-second laser pulses at 790 nm. The nonlinear absorption coefficient 'beta' and nonlinear r
A straightforward, cost-effective scheme for fabricating multi-focus droplet lens arrays is proposed. Mini lenses can be rapidly produced by dripping liquid-state polydimethylsiloxane droplets on the square glass substrate. The focal length of the lenses
We demonstrate the rotating properties of Bragg reflections and spatial lattice solitons in rotating photonic lattices by analyzing the linear and nonlinear propagations of light. It reveals that the Bragg reflection of the light waves rotates synchronous