Growth and optimization of optical traits of copper sulphate crystal exploiting L-ascorbic acid for photonic device applications

In current investigation organic ligand of _L-ascorbic acid (LAA) has been firstly exploited to tune the optical properties of copper sulphate (CuS) single crystal. The pure and LAA influenced CuS crystal has been grown from aqueous solution by slow evaporation process. The powder X-ray diffraction technique has been employed to identify the crystal planes and evaluate the structural parameters of grown crystals. The functional groups of LAA influenced CuS (LAA-CuS) crystal has been recognized by Fourier transform infrared analysis. The impact of LAA on optical transmittance of CuS crystal has been examined within 200-900 nm by means of UV-visible spectral analysis. The Z-scan technique has been employed to examine the third order nonlinear optical (TONLO) properties of pure and LAA-CuS crystal. The eye-catching effect of LAA in switching the nonlinear refraction behavior of CuS crystal from self-focusing to self-defocusing has been explored. The magnitude of TONLO refractive index (n₂), absorption coefficient (β) and susceptibility (χ³) of pristine and LAA-CuS crystal has been comparatively evaluated using the Z-scan transmittance data.