M.D. Zidan

Optical nonlinearities of tetracarbonyl-chromium triphenyl phosphine complex

The new tetracarbonyl — chromium-triphenyl phosphine complex was synthesized and characterized using ultraviolet (UV)–visible, Fourier transform infrared (FTIR), and nuclear magnetic resonance (NMR) techniques. The characterization results confirm the molecular structure of the new complex. The z-scan measurements were done by diode laser [continuous wave (CW)] to estimate the nonlinear optical parameter (χ 3). The results led to calculate three parameters: the ground-state cross sections (), the excited-state cross sections (), and thermo–optic coefficient of the new complex. This study indicated that our complex is a suitable for photonic applications.

Nonlinear Optical Study of 1,1'-Methylenedipyridinium bis[tetrachloride gold(III)] Hybrid Salt

The third-order nonlinear optical properties of 1,1’-methylenedipyridinium bis[tetrachloride gold(III)] were investigated by the z-scan method using CW diode laser. The experimental results led to estimation of the nonlinear optical absorption coefficient (β), the nonlinear optical refraction (n2), and third-order nonlinear optical susceptibility (χ). Our results show that the excited-state absorption cross-sections (σex) is larger than the groundstate absorption cross-sections (σg), this suggests that the nonlinear optical absorption in the MPTC gold(III) is due to the reverse saturable absorption mechanism. Furthermore, the obtained results suggest that our material is considered as a promising candidate for future optical devices applications.