Nonlinear Refraction and Absorption Phenomena in a Novel Nanocomposite Based on a Dye Stabilized in a Solid Hybrid Matrix

Abstract

Nonlinear optical behavior of a novel nanocomposite material based on chloroaluminum phthalocyanine (ClAlPc) embedded in silica and incorporated in the structural nanopores of a Nafion membrane is investigated using the Z-scan technique. The experiments are performed at 532 nm using 8 ns pulses at a pulse repetition rate of 10 Hz from a frequency-doubled Nd:YAG laser. The nonlinearity in the hybrid membranes is characterized by obtaining the nonlinear refractive index and nonlinear absorption coefficient. Fluorescence lifetimes are measured using a time-correlated single photon counting technique. The effects of dynamic and static quenching on photostability are studied. Incorporating phthalocynanine molecules in the stable hybrid membrane renders them stable against photobleaching and provides a convenient solid matrix.

Nonlinear saturable absorption of the sodium borosilicate glass containing Bi2S3 nanocrystals using Z-scan technique

“…Under such circumstances the normalized transmittance curve exhibits a completely symmetric shape about the waist (z = 0). At present, the open-aperture Z-scan model is widely used for the nonlinear optical absorption of materials [7][8][9][10][11]. In particular, some studies revealed that many materials exhibit more than one kind of nonlinear optical absorption simultaneously with the change in the input light intensity.…”