Nonlinear optical properties study of pure and brilliant green dye-doped bis (Thiourea) cadmium acetate single crystals.

The slow solvent evaporation technique was employed to grow pure and Brilliant Green (BG) dye-doped bis-thiourea cadmium acetate (BTCA) crystals. This study explores, for the first time, the use of BG dye as a dopant to tailor the optical properties of BTCA crystals. By influencing both linear and third-order nonlinear optical responses, BG doping holds promise for applications in integrated optic devices. The UV-Visible spectrum analysis between 200 nm and 1,000 nm has been carried out to ascertain the generated crystals optical transparency. The 632.8 nm Z-scan measurements with both open and closed apertures were employed to characterize the type of third-order nonlinearity exhibited by the grown crystals and calculated successfully. These properties include the nonlinear refractive index ( n 2 ), nonlinear absorption coefficient (β), and third-order nonlinear optical (TONLO) susceptibility ( χ 3). Calculated values of the χ 3 of pure BTCA and BGDBTCA crystal are found to be 2. 4 4 8 × 1 0 − 6 and 3. 6 5 8 × 1 0 − 6 esu, respectively. [ABSTRACT FROM AUTHOR]