Optical nonlinearities and thermal lens effect of a-Si:H films investigated by Z-scan technique

Z-Scan Measurements of Optical Nonlinearities

Time-resolved Z-scan measurements of optical nonlinearities

We introduce a temporal delay in one beam of the two-color Z-scan apparatus, which measures nondegenerate nonlinear absorption and nondegenerate nonlinear refraction. This technique allows us to time resolve separately the sign and the magnitude of the nonlinear absorption and refraction at frequency p that are due to the presence of a strong excitation at frequency oe. For example, in semicond...

Study of nonlinear optical properties of Carbon nanotubes synthesized by Nickel and Nickel-Cobalt catalysts using Z-scan technique

The nonlinear optical properties of carbon nanotubes (CNTs) have been studied by using the Z-scan technique. Experiments are performed by CW second harmonic of Nd-YAG laser at 532 nm wavelength with a power of 40 mW. The samples are synthesized by the chemical vapor deposition (CVD) method in the presence of Nickel and Nickel-Cobalt catalysts. In this work, for the first time, effect of the typ...

Z-scan and I-scan Methods for Characterization of Dna Optical Nonlinearities

In this paper, we use improved Z-scan and I-scan methods to analyze the refractive optical nonlinearities of the deoxyribonucleic acid (DNA) samples, which occur with continuous wave and femtosecond pulsed lasers and our proposed solutions to further improve both the methods and the nonlinear optical properties of DNA.

Nonlinear Optical Investigation of Biochemical Analytes in Blood Serum via Z-Scan Technique

Background and Aims: Biomolecules' optical and nonlinear optical properties are widely used for different medical diagnoses and applications in biophotonic devices. These properties are essential in studying biological processes in living tissues. Aside from biomolecules' linear optical characteristics, their nonlinear optical characteristics have lately been considered. Materials and Methods:...