Investigation of optical limiting and third-order optical nonlinear properties of 2-Nitroaniline by Z-scan and f -scan techniques

The nonlinear optical properties of 2-Nitroaniline, which is known to be a superior nonlinear optical material, have been investigated. The optical properties, such as absorption coefficients, are analyzed with UV visible spectroscopy analyses. The third-order nonlinear optical properties of the sample are analyzed with Z-scan, Eclipse Z-scan and f -scan techniques. The nonlinear absorption coefficient, nonlinear refractive index and third-order susceptibility are examined using open aperture and closed aperture Z-scan methods. The nanoscale sensitive variations in the nonlinear optical properties are observed with the Eclipse Z-scan method. The third-order optical nonlinearities occurring in the nanoscale range are also analyzed using the f -scan method and compared with the results obtained from the Z-scan measurement. The optical limiting characteristics of the sample have also been examined for its low-power optical limiting applications.