Studies on spectral, dielectric and nonlinear optical properties of L-alanine alaninium picrate (LAAP) crystals

L-alanine is one of the simplest amino acids like glycine and it is a non-centrosymmetic crystal. Its nonlinear optical (NLO) property is highly pronounced when L-alanine is mixed with a non-centrosymmetric organic acid such as picric acid. In this work, L-alanine alaninium picrate (LAAP) salt was synthesized by making reaction between L-alanine and picric acid. Single crystals of LAAP salt were grown by slow evaporation technique. XRD studies reveal the monoclinic structure of the sample. EDAX study was used to identify the elemental composition of the grown crystal. Etching studies were carried out to see the etch pit patterns of LAAP crystal. Second-order and third-order studies were car…