Investigation of the optical nonlinear properties of chlorophyll B using z-scan technique

摘要

The nonlinear optical properties of chlorophyll B dissolved in chloroform have been studied using single-beam z-scan technique with a CW Laser at wavelength lambda = 635 nm. It was found that the chlorophyll B has a large 3rd nonlinearity. The nonlinear absorption coefficient beta and the nonlinear refractive index n(2) were estimated from fitting of the experimental data, which was found to be proportional to the concentration of samples. The origin of the nonlinearity properties was discussed. Our results have indicated that the chlorophyll B could be promising candidates for application on nonlinear photonic devices.