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Growth of Bulk Single Crystals of Urea for Photonic Applications
Arumugam Saranraj,Sathiyadhas Sahaya Jude Dhas,Michael Jose,Sathiyadhas Amalapusham Martin Britto Dhas 대한금속·재료학회 2018 ELECTRONIC MATERIALS LETTERS Vol.14 No.1
We report the growth of technologically important urea crystals of record size (48 ×16 × 8 mm3) by doping sulfuric acid and employing slow evaporation technique. Thegrown crystal was identified by single crystal X-Ray diffraction and FTIR spectralanalysis. Optical properties of the grown crystal were analyzed by UV-Vis spectrumand the presence of H2SO4 was confirmed by EDAX analysis. Thermogravimetricanalysis, Differential Scanning Calorimetry and Photo acoustic studies were alsocarried out to determine the thermal properties of the grown crystal. The dielectricproperties for wide range of frequencies (1 Hz to 1 MHz) at different temperatures(35, 40, 60, 80, 100 °C) were analyzed. The second harmonic conversion efficiencyof the grown H2SO4 doped urea crystal was found to be 3.75 times higher than thecommercially available KDP crystals.