The growth and perfection of urea single crystals from solution

Characterization of a newly synthesized organic nonlinear optical crystal: Urea ninhydrin monohydrate

“…It is reported that the urea [9] and urea derivatives [10] Wavenumber (cm -1 ) urea-L-malic acid [14]. SHG measurement of the two component systems urea-ninhydrin with different compositions of urea and ninhydrin ultimately may lead to noncentrosymmetric crystal structures that are essential for quadratic NLO activity.…”

“…The search for new frequency conversion materials over the past decade has concentrated primarily on organic compounds and many organic NLO materials with high nonlinear susceptibilities have been discovered [2][3][4][5]. Urea, a promising organic crystal, exhibits large nonlinear optical coefficients, high degree of birefringence, and relatively high laser damage threshold [6][7][8][9]. Derivatives of urea offered a wide choice of novel materials and are expected to play an important role in the development of NLO devices [10][11][12][13][14][15].…”

Growth and Spectroscopic Characterization of Urea Sulphamic Acid Crystal: A Second-Ordernonlinear Material

“…6,7 A strong inorganic sulphamic acid (SA) (H2NSO3H) is the monoamide of sulphamic acid while mixing it with water it exhibits Zwitterionic form and has large applications as anti-corrosive agent. 8,9 Urea (CH4N2O), an organic compound exhibits wide nonlinear optical coefficients, high laser damage threshold and a high degree of bifringence [10][11][12][13] .Urea is a biological natural compound typically found in the urine of mammals. There are several different usages and applications of it, such as in feedstock, glue, fertilizer, commercial products, and resin production.…”