Nonlinear Optical Properties and All Optical Switching of Curcumin Derivatives.

Area of Science:

• Materials Science
• Optoelectronics
• Computational Chemistry

Background:

• The synthesis and characterization of novel organic compounds are crucial for developing advanced optical materials.
• Understanding electronic structures, including HOMO/LUMO energies and band gaps, informs material properties.
• Nonlinear optical properties are essential for applications in optical switching and data processing.

Purpose of the Study:

• To synthesize and characterize the OR1(E1,6E)-1,7-bis(4-propyloxy phenyl)hepta-1,6-diene-3,5 dione compound.
• To investigate the electronic structure and nonlinear optical properties of the synthesized compound.
• To evaluate the potential of the OR1 compound for dynamic and static all-optical switching.

Main Methods:

• Computational techniques were used to calculate HOMO, LUMO, and band gap energies.
• Nonlinear refractive index (NLRI) was determined using diffraction patterns (DPs) with a 473 nm laser.
• NLRI was further measured using the Z-scan technique, and DPs were numerically simulated using the Fresnel-Kirchhoff integral.

Main Results:

• The synthesized OR1 compound exhibited nonlinear refractive index values of 10⁻⁶ cm²/W (via DPs) and 0.25 × 10⁻⁷ cm²/W (via Z-scan).
• Vertical convection currents influenced the asymmetry observed in diffraction patterns.
• The compound demonstrated successful dynamic and static all-optical switching capabilities using 473 nm and 532 nm laser beams.

Conclusions:

• The OR1 compound possesses significant nonlinear optical properties suitable for optical applications.
• The study successfully demonstrated the feasibility of all-optical switching using the synthesized material.
• Numerical simulations of diffraction patterns showed good agreement with experimental results, validating the characterization methods.