Characterization of Organic NLO Materials and their Application in Optical Devices: An Update

In the present study, L-histidine alpha amino acid is chosen for the single crystal growth due to their tremendous features of interest like molecular chirality carbon structure, presence of flexible conjugated bonds, that leads to wide transparency ranges in the visible and UV region. The single crystal of L-histidine and urea doped L-histidine were grown by solution growth method. It is an organic non-linear material that exhibits a non-linear behavior of light due to the presence of conjugated - ^* electrons. All the grown crystals have good dynamic structures and are transparent to visible light. They showed second order frequency generator of non-linear and non-centrosymmetric organic material. These features make the grown samples applicable in optical modulators, optical devices, laser frequency modulators. Result from the UV-Vis spectroscopy showed that the samples are transparent in nature in the entire visible and near infrared regions. The estimated optical energy bandgap, absorption coefficient, optical conductivity and optical susceptibility were all dependent on the guest dopant(Urea) into the host lattice. The obtained result from FT-IR spectroscopy revealed the presence of different functional groups in the related compound. Generally, this study revealed that the grown samples can be applicable for second harmonic generation study.