title: Crystal growth and characterization of γ-glycine grown from potassium fluoride for photonic applications.
abstract: Single crystals of γ-glycine, an organic nonlinear optical material have been synthesized in the presence of potassium fluoride (KF) by slow evaporation technique at ambient temperature. The size of the grown crystal is up to the dimension of 12 mm×10 mm×8 mm. The γ-phase was confirmed by single crystal X-ray diffraction, powder XRD and the FTIR analysis. Optical absorption spectrum reveals that the grown crystal has good optical transparency in the entire visible region with an energy band gap of 5.09 eV, which is an essential requirement for a nonlinear optical crystal. Thermal stability of the grown γ-glycine crystal was determined using the thermo gravimetric and differential thermal analyses. The NLO activity of γ-glycine was confirmed by the Kurtz powder technique using Nd:YAG laser and the grown crystal exhibits high relative conversion efficiency when compared to potassium dihydrogen phosphate (KDP).
authors.affiliation: Department of Physics, Sri Venkateswara University, Tirupati 517502, India.
authors.forename: G R
authors.initials: GR
authors.lastname: Dillip
authors.forename: P
authors.initials: P
authors.lastname: Raghavaiah
authors.forename: K
authors.initials: K
authors.lastname: Mallikarjuna
authors.forename: C Madhukar
authors.initials: CM
authors.lastname: Reddy
authors.forename: G
authors.initials: G
authors.lastname: Bhagavannarayana
authors.forename: V Ramesh
authors.initials: VR
authors.lastname: Kumar
authors.forename: B Deva Prasad
authors.initials: BD
authors.lastname: Raju
mesh_terms: D003460:Crystallization; D018360:Crystallography, X-Ray; D004055:Differential Thermal Analysis; D005459:Fluorides / Q000737:chemistry*; D005998:Glycine / Q000737:chemistry*; D055095:Optics and Photonics; D017785:Photons; D017680:Potassium Compounds / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D017680:Potassium Compounds; C033320:potassium fluoride; D005459:Fluorides; D005998:Glycine