Single crystal growth of bis guanidinium hydrogen phosphate monohydrate by Sankaranarayanan-Ramasamy method and investigation of its linear and nonlinear optical properties

Transparent single crystal of bis guanidinium hydrogen phosphate monohydrate of length 45 mm and diameter 16 mm have been grown from saturated solution of deionized water adopting Sankaranarayanan-Ramasamy method. Optical properties such as its transmittance, band gap, Phase-matching angle, spectral phase matching bandwidth were measured and their values are compared with the standard compounds. Third order nonlinear optical property was found using Z-scan technique. Optical limiting property of the title material has also been discussed.